Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa3cf4d46dbb1f9…

MALICIOUS

PDF

41.8 KB Created: 2020-08-07 22:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e9a2c20ca9d59ab139a6a90afdf2738 SHA-1: 7909fc715f3af3296c83cf162a1d00b0f0843ecc SHA-256: 6aa3cf4d46dbb1f91d10db74ac043d53bc8bba374737a0f60eae77dfa45000fb
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 designed to obscure the final destination. The primary link leads to `ttraff.com`, which is known to host malicious content. This suggests the document is part of a phishing campaign aiming to redirect users to malicious sites under the guise of providing free PDF downloads.

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=python+programming+for+beginners+pdf+download
    • http://files.iliontruevaluehardware.com/uploads/1/3/2/7/132710627/d8fab6129b302.pdf
    • http://files.dakeiteasy.com/uploads/1/3/1/8/131871859/86d2546e829.pdf
    • http://files.mrmckeebysclass.org/uploads/1/3/1/4/131437296/rezaxafetagogewelila.pdf
    • http://files.lornelionsclub.com.au/uploads/1/3/1/4/131408245/litowex_dabeduzu.pdf
    • http://files.thinnerstrongerhappier.com/uploads/1/3/1/8/131856602/dizeroxa_sisalada_xifoxuzire.pdf
    • http://java67.comHello
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/3656605784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/3920385462.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/43855279853.pdf
    • https://cdn.shopify.com/s/files/1/0438/0652/3552/files/sedig.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/kepopabewunamugapej.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/30132702451.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4650/files/73711816557.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/kisatuferodajowoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/kopegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/68813421760.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/69095004975.pdf
    • http://javarevisited.blogspot.com
    • 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_off00006406.bin
bace070d4f8803eaded1d151a78cc22eac1e48a7c2cdac988bf299d7b2491ac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 5788 bytes
font_01_sfnt_off000077ab.bin
3f0561356571dd980f4e866cac79960718926776ecb8981c739336ed509f20cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 10036 bytes

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