Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a0ccf6fba906c1…

MALICIOUS

PDF

44.0 KB Created: 2020-07-30 07:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70f7ad665e46806cc039c905f3a5373b SHA-1: 99488cc239e6cc3876f7517ae7c44d71d1e727f0 SHA-256: 02a0ccf6fba906c1d982851e4445ded8509d67aa6e64ec2f3d890228281101a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, appears to be related to 'Sunday Adelaja pdf books', suggesting a lure to disguise the malicious intent. The ML classifier strongly indicates maliciousness, and the presence of a link farm points towards SEO poisoning or traffic redirection tactics.

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=sunday+adelaja+pdf+books
    • http://files.acharlotteweddingminister.com/uploads/1/3/1/8/131871477/9980172.pdf
    • http://files.pennyormsbee.ca/uploads/1/3/0/7/130775232/2738980.pdf
    • http://files.thecaruca.com/uploads/1/3/0/7/130775337/6f12e46fb.pdf
    • http://files.howardsgroveagzone.org/uploads/1/3/0/9/130969368/mejagajirafuvuji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/petezisulawizide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/pozopumidosoveweve.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/febib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/bavuzalesobukezidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/pefokepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/22101690783.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/kixiwixene.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/senek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/saxuvusetusexowumefavun.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/velibomebap.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/61089789707.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/45201760205.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/21286066848.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db6.bin
9c205df1aba5f18f5dff924edc0edc2c5e9be295e4678bed3c6ade3823926af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB6 5176 bytes
font_01_sfnt_off00007f6b.bin
dc3f13afba257daf56acc61d0be9e6b00c3a2cf714b0fc1f1bda4f01745d6f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 10260 bytes

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