Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d34888cb552581…

MALICIOUS

PDF

45.1 KB Created: 2020-08-09 19:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e4916cf5684af13ac8e1f38ac42830 SHA-1: 386147eb3b50c5bde2c947f49ee042261b85b110 SHA-256: 72d34888cb552581abd550c1022d0c5d2947cdd5ad6bddfd885f576e6606ff7d
154 Risk Score

Malware Insights

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

The PDF contains a deceptive link disguised as 'Veterans day coloring pages pdf' which redirects to a malicious infrastructure at `ttraff.ru`. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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=veterans+day+coloring+pages+pdf
    • http://files.towardthetruth.com/uploads/1/3/1/4/131406849/5130199.pdf
    • http://popomi.jimdarow.com/uploads/1/3/1/3/131383483/xalugabonaxi-femitefuranugob-mavawepotos-pawoz.pdf
    • http://files.paulavalb.com/uploads/1/3/0/8/130874451/6c58f.pdf
    • http://files.interimarketing.com/uploads/1/3/1/3/131398351/cf28134e0d099.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/638_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/niveseriwonujogineje.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/noxokivofemude.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/fusionner_plusieurs_fichiers_word_en_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/20885408442.pdf
    • https://cdn.shopify.com/s/files/1/0434/3539/3191/files/nekeditevinubexeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9116/files/jpg_to_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7434/files/molikoxonovofam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0443/3159/7980/files/96493626311.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/coordination_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/wubatoxuzomonorowatinawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/58270455648.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/lepowoka.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_off000064a1.bin
f1e094d7d58ca8ad9b90b67c25bc7e49a9bb7ee51df6413359b9ef351c9810f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A1 5180 bytes
font_01_sfnt_off00007650.bin
9748219f92abeb600384a37fe9b7e7892c386fc05584eec561886ff58df8eea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7650 10240 bytes
font_02_sfnt_off00009950.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9950 4324 bytes

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