Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cc1f91e82aeb79…

MALICIOUS

PDF

55.9 KB Created: 2020-08-22 12:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 33afc96dd26ecfc08f0f98fd40d7768d SHA-1: 6d031371880e1f3a1865f1a49a7c0f32a8c0b7e9 SHA-256: f0cc1f91e82aeb7977f0206eb030d5ec22a6e96e3813ee2aeeaf4a769743aa66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a book title, which redirects to a malicious URL. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The PDF also hosts a large number of links, many pointing to benign Shopify URLs, likely for SEO manipulation or to obscure the malicious redirector.

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://ttraff.com/pify?keyword=analytical+chemistry+7th+edition+pdf In PDF document text
    • http://jivam.theartofcrafts.ca/uploads/1/3/2/7/132741099/zarivofijajopika.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/1/0428/6382/0959/files/89836732032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/8617087331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/34529451882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/rusiporo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/tekupigugedulomolelibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5095/7974/files/pimewivewak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/kobogumade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8474/9729/files/electronics_and_communication_engineering_projects_for_final_year.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6404/7269/files/days_of_week_flashcards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/17377910747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/wesesofasiwalufatotisenob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1809/9615/files/68683391132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/tamale_spreader_at_walmart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A99 5568 bytes
SHA-256: 69dd06cd56118b439982b3e0cf27763d8be7954a120866a4300581e59be4f506
font_01_sfnt_off00009d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D56 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000a5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 14472 bytes
SHA-256: ec597cec71dc7d3e64c4e9b8d352b956c2963830fbf29d7f24f401132aca129c

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