Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bb5053a494c9da…

MALICIOUS

PDF

37.3 KB Created: 2020-08-25 20:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e876d76ce8da9bc4ab2248e25fe231a2 SHA-1: a6f887fef1a2da9a3a90d2e8aede3ff066e6d349 SHA-256: 68bb5053a494c9da28d5ee8c836d3f30219f9ea474e4f6d827ad55e2cddb384b
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text related to "Puzzledom answers" and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly indicated maliciousness, and the presence of a redirector link supports a phishing or malicious content delivery attack pattern.

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=puzzledom+answers+one+stroke
    • http://files.wellnesscollaborativenatick.com/uploads/1/3/1/3/131383791/6467716.pdf
    • http://files.solutionstailored.com/uploads/1/3/1/1/131163841/5a811f025e02.pdf
    • http://sevam.vintagebandsforhire.co.uk/uploads/1/3/1/6/131637896/33db44ec6051.pdf
    • http://vuwow.planahenparty.com/uploads/1/3/1/4/131437657/4039609.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/debiwodexare.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/sojujororoponosedene.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/allosteric_regulation_of_enzyme_activity.pdf
    • https://cdn.shopify.com/s/files/1/0435/8691/2413/files/acer_aspire_one_zg5_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/tuxoxumasujapeziviwek.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/lavegofonapedasepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/this_egg_smells_musty_like_rotting_leaves.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/digimon_world_ds_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/socks_coloring_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/jilixarap.pdf
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/ravonobabawalumoki.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_off00005491.bin
16ba1a47d08f91a1d357a6393dcf938e7f31c9daaa0ecda37a8940a51465adfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5491 5176 bytes
font_01_sfnt_off00006628.bin
ad4f342cda06cc586e37f309ce6f419be3c5f3b91ae35157029a208cfe257845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6628 10048 bytes

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