Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8a1c75e14f1b30…

MALICIOUS

PDF

62.6 KB Created: 2020-08-10 21:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddfc287d104231b6fb976a30d6a230ea SHA-1: cedb2e05c2b1d9f91377e05eea38ee566f8d5d95 SHA-256: ac8a1c75e14f1b3047b77978dc5d308d383411a040b65265805fe7900ce29e47
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=pandora+s+jar+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended destination. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the final malicious destination or to improve search engine ranking for malicious content.

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=pandora+s+jar+pdf
    • http://momupod.goldnchromefishing.com/uploads/1/3/2/3/132303338/mebugixiguvefixasasu.pdf
    • http://files.mplusfphotography.com/uploads/1/3/2/6/132682042/baf05.pdf
    • http://files.rocksolidcorporateevents.com/uploads/1/3/1/0/131069812/e1e7b983c5.pdf
    • http://files.scmegale.com/uploads/1/3/0/8/130814666/buzotabelemerozomiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/53858872147.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8823/files/vaxujibojapune.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/sodeluzogupijiramavumakut.pdf
    • https://cdn.shopify.com/s/files/1/0432/9177/1046/files/kisigepasaxuruw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5579/files/22739569452.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/general_zoology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/51966219906.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97046042130.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/90227251197.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6735074847.pdf
    • https://cdn.shopify.com/s/files/1/0439/1125/0075/files/tuzisivojezu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/funuxojomotimunelop.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8a0.bin
24527185d96a7ac453c1dd959a01652a30861508ea7b465b0d18c33235a7ab27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A0 4624 bytes
font_01_sfnt_off0000b84e.bin
37b1c6614cb389315f5ab02f6e707f25b48be11bf43fc97d6bb257353f038d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB84E 11904 bytes
font_02_sfnt_off0000df66.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 4324 bytes

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