Malicious PDF — malware analysis report

Static analysis result for SHA-256 8035f9db73ac614c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 05:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bd466873f26e9fe72573bac1779d0c0 SHA-1: e3cc618de35b6ee42f7b0ca43e0b5f5f9cdc9c70 SHA-256: 8035f9db73ac614cb494cf97de18158d5609c6c72366b069415f2a898bed3534
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to '12th five year plan objectives pdf' and a URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous Shopify-hosted PDF links further indicates a link farm used for SEO manipulation to attract victims.

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/wb?keyword=12th%20five%20year%20plan%20objectives%20pdf
    • http://files.clevelandbouncer.com/uploads/1/3/0/7/130740490/pokewedudinaxuj.pdf
    • http://momomu.sculpturebylebowitz.com/uploads/1/3/1/8/131871390/a14165.pdf
    • http://files.movement-intelligence.com/uploads/1/3/0/8/130813325/67dd9d4a3548f74.pdf
    • http://xoxix.oakhillsoregon.com/uploads/1/3/0/7/130739553/639c55a7eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/why_did_notsobot_get_banned.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/simol.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/zunujozekikotejuteloziwom.pdf
    • https://cdn.shopify.com/s/files/1/0437/0048/6312/files/doxewik.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/90621539488.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7437/files/8797215418.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/vapunukobalibabiruvinefa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/xoxeginovapatemobido.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/39872699547.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/gatutugutigetolodug.pdf
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/zefezev.pdf
    • https://cdn.shopify.com/s/files/1/0434/6544/1430/files/56770165975.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_off00006366.bin
5e2e107cb8d1eb674f5da2667eb0c7a698daaf0dd812af659335f897b7b0e97b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5712 bytes
font_01_sfnt_off000076e1.bin
b6e914056f80edadf3ea0fd2a1ea610a3c063dcd133cf31d994f806abe2e852f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E1 10096 bytes

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