Malicious PDF — malware analysis report

Static analysis result for SHA-256 633c4aa719174385…

MALICIOUS

PDF

69.4 KB Created: 2020-08-03 05:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd2883f27eac3a75e65bef1ed19caf1 SHA-1: 53a857c457a576fb5bbaa53e3ebb0b9f78d1eb9d SHA-256: 633c4aa719174385efa53b2306b7e92993f9270e31cdd5bff6e431920af979eb
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 pointing to 'https://ttraff.cc/pify?keyword=wow+trial+of+the+sea+lion'. This suggests the document is designed to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's part of a phishing or malware distribution campaign.

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.cc/pify?keyword=wow+trial+of+the+sea+lion
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • http://files.mnhistoryalliance.org/uploads/1/3/0/7/130775013/jenatesojox-vusuva-wabekeb-zemireli.pdf
    • http://files.abbypartyrental.com/uploads/1/3/0/7/130739648/zusamo-vafazuzofupusa.pdf
    • http://kamidem.jerostique.com/uploads/1/3/2/8/132815367/3643cc910fbd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/94765937169.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/jefibabulixamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/72182222303.pdf
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/12418595802.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/xisojitenewibodomotixida.pdf
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/nixidi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/89737263009.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/59017813088.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/sugiroligizokafeji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.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_off0000d1ce.bin
604006dd4a560a4b918db9eb45368c88e857446e54fbc78d54d4d6d742bbfc5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 4960 bytes
font_01_sfnt_off0000e2be.bin
e2703fcac34fdb543b55b5c855f96bcdfd906e433a99ab5c2df0ca06f0aca145
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 11160 bytes