Malicious PDF — malware analysis report

Static analysis result for SHA-256 10981dc5dc1aad1c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-07 13:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59494c75e359dec29bc1a8429827391b SHA-1: d20d18e08515948e7283b5ce521e61c9cc935857 SHA-256: 10981dc5dc1aad1c585b274e3482bacf4fea6da62f05ec8a02b391bb2982fd20
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity. The presence of a link farm and the ML classifier's high confidence indicate a malicious intent, likely to redirect users to harmful content.

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.ru/pify?keyword=food+cost+control+formula+pdf
    • http://files.canyonwindfineart.com/uploads/1/3/0/8/130874030/aa6e9.pdf
    • http://files.flocrowcroft.co.uk/uploads/1/3/0/8/130814346/11e77c7.pdf
    • http://files.pacengtech.com/uploads/1/3/0/7/130740483/3d87ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/jigifajobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/bible_english_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/46146000522.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/xaxuvenix.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/catfish_cooley_tampon_story.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/canon_7d_mark_ii_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/abbreviation_for_thessalonians.pdf
    • https://cdn.shopify.com/s/files/1/0431/6902/2109/files/jufawosagok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/97163071297.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/kanibawanibazamagezejeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/34375058467.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_off00007477.bin
62e4266092241ed8146a5dc480c91e60512def34de514ff84c84201c66c07019
pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 5256 bytes
font_01_sfnt_off00008641.bin
e00632d48ece89d0587fdcd2e73dc7cf772acbc878ce596590213bc879b5f321
pdf-font-stream PDF embedded font (sfnt) at offset 0x8641 10516 bytes