Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff96d8f64b0cfd82…

MALICIOUS

PDF

58.0 KB Created: 2020-11-03 05:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 48aa27dd0e4e745e980c09178a30eb0f SHA-1: 95cd18b5c91f7287f97260335850b13ce1759b66 SHA-256: ff96d8f64b0cfd827adf7f52fd8b0943304ee18fa3b9aa69bfecb5d8cec31ad8
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.me/123?keyword=cheats+for+farmville+2+country+escape+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5f9e07080d321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f8726b2117ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1526/4168/files/witaforaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5475/7575/files/thinklabs_stethoscope_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5971/4454/files/vimiwibabanujide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8838/5448/files/oig_compliance_program_effectiveness_resource_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0754/6816/files/how_many_letters_are_in_the_alphabet_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/76603222301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/hegner_scroll_saw_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7108/7007/files/75162723120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2874/1828/files/fufidomedojipisopezofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bb146d-b581-42cf-adf4-2f21cc650668/79260509317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6250/4855/files/mibuxumejebapoxir.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 5452 bytes
SHA-256: f9b65e2406133699b799a6a1daefee3cf170ea01606b012043d88f9cd1b9dac5
font_01_sfnt_off000092e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E2 6432 bytes
SHA-256: 3ab447b25bfcd3a3ca8bd66dc2bc89d4037c3faf5541166dc9a7418113a8ca3a
font_02_sfnt_off0000a633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA633 11200 bytes
SHA-256: fa56592cb73049d7ddf4deb8bb1c65be052fbd580db4531829ba25848fe4c4c6
font_03_sfnt_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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