Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e02e84b0ba8be6b…

MALICIOUS

PDF

44.4 KB Created: 2020-10-11 21:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3f7bb9a545613108a6229c7e9c6696f7 SHA-1: 9e46b11077cf4c4827f1644c22a73b8f9a2c0f4e SHA-256: 1e02e84b0ba8be6b97bb4b7d4c1123c58489f635f4b8bd1d96477d9ff4216e29
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and several other Shopify URLs, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=fox+face+parti+pomeranian In PDF document text
    • http://files.casto13.org/uploads/1/3/0/9/130969724/tolukefi-jariteveburo-folalusa-gekawi.pdfIn PDF document text
    • http://xoxojomiv.rvadventuretreks.com/uploads/1/3/2/3/132303382/fipenadoteg_vedajexenigegun.pdfIn PDF document text
    • http://files.akiineventos.com/uploads/1/3/0/7/130738919/bevadosogako.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/1/0440/5798/5189/files/giordano_shops_in_dubai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9934/8885/files/86469088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/quarter_in_spanish_measurement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3517/1736/files/83581147216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7751/5929/files/41301708092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8141/2007/files/comma_splice_worksheet_esl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7807/2985/files/mabinogi_squire_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/buhler_farm_king_mower_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/if_you_give_a_pig_a_white_house.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e96fe2-2d04-40f2-bb3b-9d7231f5b4c4/xuvozipadutodebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165826c6-74e2-436e-a20d-4decb6199c4b/tuxawiluxorugapimupupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0b842d-7ad3-4da0-90bc-2d43abb37b86/loludemebugises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f939560f-31f3-40e1-b8dd-0a99c52ca0c2/vegumavuvorud.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_off00007124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7124 4972 bytes
SHA-256: 84f34d1772f5c5b15995b34c683b972be3adbc456bd1b27e7df368a5ab064049
font_01_sfnt_off00008204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 10252 bytes
SHA-256: 955f78ad0522e266ff32d2f8081e0ab9ca8a5c1abbd20ccfb27181ace36979c7

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