Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c402823ab9991c3…

MALICIOUS

PDF

48.8 KB Created: 2020-08-06 04:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2bd860e9845feabf5c36dcaf6c75725 SHA-1: f1fa2ea20787cca4d790bf0913694923f45b832d SHA-256: 0c402823ab9991c30b8f62c604abcddfd92b9c3cd70ea29b4461a49be020d5cf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text suggesting it is a '2020 uae calendar with holidays pdf', which is likely a lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm designed to obscure the malicious redirector.

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=2020+uae+calendar+with+holidays+pdf
    • http://mesop.ashdownsafetytraining.com/uploads/1/3/1/3/131384429/8197345.pdf
    • http://files.emmaleneoysti.com/uploads/1/3/0/7/130775784/56dba5fb3803983.pdf
    • http://files.lotusandbalance.com/uploads/1/3/0/8/130874276/tikuxibamivusi_jipex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/xugulukedezep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/attack_on_titan_browser_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/one_piece_gold_full_movie_english_sub.pdf
    • https://cdn.shopify.com/s/files/1/0436/2046/6848/files/6446781227.pdf
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/62998564376.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/busixemonefemosomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/63804418486.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/bifanorudusuzuzugube.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/better_together_chords.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/lemabu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/apostila_java_orientacao_a_objetos_caelum.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_off000070fb.bin
b2535199895b3a9c6329ead4d542d85cf41978651415fdb00a37e1511f5a1b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 5496 bytes
font_01_sfnt_off000083ad.bin
2850fb81801e687206cba3c7b62a20221f66945b4b76cfd93ff570212bce8185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83AD 10748 bytes
font_02_sfnt_off0000a858.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA858 4324 bytes

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