Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b005465b0f1c612…

MALICIOUS

PDF

47.5 KB Created: 2020-08-22 12:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e668c7e792fb65aae3bc0d377cdb2fa1 SHA-1: e492aceda8b49cf5e6a9e78616df22a15ec9c071 SHA-256: 0b005465b0f1c61291ce23b54ef900ce11c0328f0f7b7c5d42261de60d90e20f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that is known to host malicious content. The document body also contains a direct link to this redirector, suggesting an attempt to trick users into downloading a payload or visiting a malicious site. The ML classifier strongly flagged this PDF as malicious.

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=play+minecraft+pocket+edition+free
    • http://dotebe.lorraineparishuptowndowntown.com/uploads/1/3/1/3/131380183/sobimutu.pdf
    • http://files.nicelawoffice.com/uploads/1/3/0/8/130814129/950cb0986f126.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6041/1033/files/wamodokaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/t._i._live_your_life_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0445/3777/4239/files/powabosepiza.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/90731192685.pdf
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/marisimizejiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/mathematics_for_economists_carl_p_simon_lawrence_blume.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/zarokazakudojum.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/kenmore_series_600_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/nexoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/anemia_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/9516/9950/files/4707270818.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/wazolole.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_off00007a41.bin
b95fcf8c3f2d741cfcef8a4faf87d3a291d89dc734a0634fc4cc95009cda014e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A41 5292 bytes
font_01_sfnt_off00008c25.bin
aadfaf5bb351f557edf5d737f48e824804199d2d92011ef2ce50fa7e6989e23d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 10652 bytes