Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff5c0a2207f5b76…

MALICIOUS

PDF

91.0 KB Created: 2020-08-04 13:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 854ce31810c6ae02e1e60681595fb31c SHA-1: 3bf13b546d96c572383bc2ae6ef2743246df660d SHA-256: 7ff5c0a2207f5b7628cc6919a853648a9d3ae07da2f4ae898c588e8e6e5395c2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the link farm behavior suggest an attempt to redirect users to malicious infrastructure.

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=bwv+1065+pdf
    • http://files.glamourcosmeticsofficial.com/uploads/1/3/2/7/132712093/kurozolejaxojig_sozisitabenetul.pdf
    • http://files.jandabendquilts.com/uploads/1/3/1/6/131606876/50e71188df4.pdf
    • http://files.arcanagardens.com/uploads/1/3/2/7/132710772/xolojow.pdf
    • http://files.problematticpod.com/uploads/1/3/1/8/131871701/biwewulafijip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/jexokiguzijoxoxevot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/butolezofiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/55339807102.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/17555789640.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/59952139092.pdf
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/24478342507.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0919/files/jidifedagopoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/funuponekowudak.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/votiteso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/2027217351.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/53739517400.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011de2.bin
555e2c682155c5af32efa4f45853335ef1c306bc4bddf5dd41a1b278f7bc5344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 4520 bytes
font_01_sfnt_off00012d59.bin
55431cce06473d8460acc65973a4d0bc5fd8b3093b069f2b8722a6558e7eced1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 10260 bytes
font_02_sfnt_off00015071.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15071 4324 bytes

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