Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f6344cc68fcaa8…

MALICIOUS

PDF

54.6 KB Created: 2020-08-12 11:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23c1a42430078802a375fcf1c38420b7 SHA-1: b8abc288c0bd152985956e591011fc3da395498b SHA-256: 09f6344cc68fcaa8a1b5ffea1ee18cdb71dab7bd4e3bc3671a61122e4d621763
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a product search, likely intended to trick users into clicking the malicious URL. The presence of multiple external PDF links suggests a link farm or SEO poisoning attempt to obscure the malicious intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=parkside+air+paint+spray+gun+pdfp+500+c3
    • http://files.hartfeltservices.com/uploads/1/3/1/4/131452982/wagitiliwivev.pdf
    • http://wufonelav.wildconnectionart.com/uploads/1/3/2/7/132712615/jubibowarorof.pdf
    • http://files.peterschooltasakou.com/uploads/1/3/2/7/132741155/7603467.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/3997/1738/files/articulo_cientifico_cancer_de_prostata.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/49258551477.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/bobifafofexuteb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/48154675178.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/caminito_de_la_escuela_letra.pdf
    • https://cdn.shopify.com/s/files/1/0436/4442/0246/files/77586995158.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/bozop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/74118267330.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/xomopafunigupanaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/gejokekexikusojepot.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/7915638730.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/nokovafiwew.pdf
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/zeritibad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4f.bin
914040f31af646be7caa93556f5c59e2eeae31bab5528940bc836feb3a33b4fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4F 5660 bytes
font_01_sfnt_off00006da9.bin
790f67d3ad82eeaf93483834bec56c3fa41f4a2349ce06a329f7aef0e21f3ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA9 1728 bytes
font_02_sfnt_off0000764a.bin
95edc44d217f5ccd5fdd4efe4832256df892364f874f6e933f08d18ab6702f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 15824 bytes
font_03_sfnt_off0000a72b.bin
a9049e2740f28e07ceae22d5f1e2fc0df0884d12edefc4f119790aeee9b14a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA72B 16196 bytes
font_04_sfnt_off0000bc46.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC46 4324 bytes

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