Malicious PDF — malware analysis report

Static analysis result for SHA-256 730fe1a29ed6cc75…

MALICIOUS

PDF

54.6 KB Created: 2020-08-09 02:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a01170cd0414899f5c897135a260b214 SHA-1: dba8d370cee9470bfdff73d15f5668cf65afe5ea SHA-256: 730fe1a29ed6cc75397164afb83c96ad42db4686563736e7fc9c93e02475257c
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains text related to 'byod security policy' and a URL, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=byod+security+policy+pdf
    • http://files.reveil-corporel.com/uploads/1/3/1/8/131856105/terokevu.pdf
    • http://files.rockytopvacationhomerentals.com/uploads/1/3/1/8/131856288/6977774.pdf
    • http://files.andreserpoosh.com/uploads/1/3/1/3/131382141/gizobotudotized_xuborogi.pdf
    • http://files.cassandraliuzzo.com/uploads/1/3/1/8/131856125/ralonaxigawiro.pdf
    • http://files.jess-cbd.com/uploads/1/3/1/4/131483143/680103.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/nopal.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/infarctus_du_myocarde_causes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/kojuviguravujok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/29300089744.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/rodik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/76334740831.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/el_aguijon_de_pablo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/52991617285.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/konafetujubikejerafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/numpy_rotation_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/28842258253.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_off000097dd.bin
ad5167bbf77f331fe20f29b207f40850da01685ed0e4a2a6ac8a1a1d77406772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97DD 5092 bytes
font_01_sfnt_off0000a950.bin
cd90dafd47f5283a720951c4e91f16e3cace4ef2bd5399ba91cd0cd44537a84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA950 10748 bytes

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