Malicious PDF — malware analysis report

Static analysis result for SHA-256 0558701f9e56443b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 14:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 964bed3ff243a4dac92ad4576aa180b6 SHA-1: cdfb4b2e002f401ef5cb55afff94beff850036ff SHA-256: 0558701f9e56443bf60e392eefc55589d350a1a61a2887f371c7934ad8dfe3e5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the target URL and references a PDF about adjectives, likely a lure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports the 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.com/pify?keyword=adjectives+and+their+meanings+pdf
    • http://files.eastsidecofcfarmington.org/uploads/1/3/1/4/131406885/5946978.pdf
    • http://luxibop.oakparkbands.org/uploads/1/3/1/4/131407921/487ef83af.pdf
    • http://vanujixu.sscpn.org/uploads/1/3/2/6/132680813/pivupup.pdf
    • http://files.cramericonstruction.com/uploads/1/3/1/0/131070420/f1662e4a8694e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/44771915412.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/xojodajemakedakilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/gidaxibomilabasovinegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/73635489358.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/poxobufipixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/78636995064.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/49162695861.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/tubewebidirutiwiled.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/pst_to_hawaii_time.pdf
    • https://cdn.shopify.com/s/files/1/0438/3938/9856/files/download_acrobat_reader_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0444/6827/3319/files/curriculum_evaluation_definition.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_off00006433.bin
d03cc8d209b6fd67479f495daaed44b2bf8e61b4895665ba61913647f636efb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6433 5340 bytes
font_01_sfnt_off00007637.bin
e1d0ad4e4a7f559190c94073ecdad55cf23197a6b52f719633c6134976630c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7637 10184 bytes
font_02_sfnt_off0000990f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990F 4324 bytes

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