Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d244767257f75d…

MALICIOUS

PDF

48.0 KB Created: 2020-10-15 17:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0403919910dac3adca8b82a2884ef5d1 SHA-1: 846ed568701d092ab08b02f7c07470a90a25ee40 SHA-256: b6d244767257f75de3c65c35a7c04b3ffdb19badd9d4bde340181cda882d76ac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous invisible links and a large number of external PDF links, many with SEO-optimized titles, designed to drive traffic to potentially malicious sites. One prominent URL, 'https://gettraff.ru/123?keyword=tema+sul+riscaldamento+globale+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=tema+sul+riscaldamento+globale+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86ffb9c63ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8743326a299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8714f0f27e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f87c277de9a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f87dc259ae78.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/69cda82938.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/xerimeloxozefas.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/mirikerilota-xuvuge-lolavaxer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/randy_and_evi_quaid_net_worth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/weber_school_district_lunch_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4519/4408/files/taxekukerefusixufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/crisis_that_can_occur_during_family_life_cycle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1702/6715/files/recaptcha_not_working_on_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5849/0275/files/the_butcher_of_anderson_station_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4693/5969/files/the_sniper_types_of_conflict.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2480/8096/files/88725311309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8028/6876/files/count_data_models_in_sas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9166/6106/files/97808491724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4330/5110/files/wagofuzosewosevezenowizoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5226/1287/files/future_floor_wax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6700/2020/files/practicing_radical_acceptance_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3032/2071/files/recognition_proteins_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cde280-b290-4441-ac34-1f97829709e7/46984478495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5891e4f3-82c5-4fad-adde-672386d259bb/sakogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c0d32c-913b-46ea-acbb-9f187b0d6afa/83333039177.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 5564 bytes
SHA-256: 1850d6f4071a126db28c87a5ba05b4a46d4a9c7866605cb6a8bb0f0f52fd229e
font_01_sfnt_off00008e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E03 11140 bytes
SHA-256: b20598c62dafb12f2f3ceee823324caabfe0c3bb408c1e0df86a4a71e43846a0

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