Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2dd2f046952d37…

MALICIOUS

PDF

41.2 KB Created: 2020-08-26 11:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9994424dfd2f1fbc3b00cf12d3355cfd SHA-1: e44711a07514d522895e91957d52554774d797ed SHA-256: 9e2dd2f046952d377f41e8625b2d9dcb26fb79ceb302a8224ed99a3e4ec13103
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The heuristic firings indicate a malicious redirector and a link farm, suggesting an attempt to obscure the final destination and potentially engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious nature of this PDF.

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.link/pify?keyword=automatic+auto+transformer+starter+pdf In PDF document text
    • http://files.dressedinitaly.com/uploads/1/3/1/3/131381332/wawifoj.pdfIn PDF document text
    • http://mezuzo.wflta.com/uploads/1/3/1/0/131070036/776a639.pdfIn PDF document text
    • http://fekogibo.crowdensatz.com/uploads/1/3/1/8/131856772/vizilosadinijetene.pdfIn PDF document text
    • http://files.theexoticanimalencounter.co.uk/uploads/1/3/1/1/131164462/bibirojod-kopukasine.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/1/0433/8001/5262/files/sisebusaxiwipavosejeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/15104577474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/zotuwalibirisuwomobewomor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/diccionario_ecologico_ambiental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/79535485703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0205/2257/files/communicable_disease_ppt_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/tumefujozenutal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/size_categories_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/58959258627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/valuation_of_interest_rate_swaps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/retirement_party_invitation_template_ms_word_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/86034277271.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_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 5260 bytes
SHA-256: 3cab12c0f9741f222f394f8f35292c474eca47c2e3bd06c9f7d9c5c441848937
font_01_sfnt_off00007640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7640 9852 bytes
SHA-256: aec1da16dbe0eece71c51cebbe4531a459022886832418eb666476f747afcbf6

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