Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b2ca31ea8d6f5d…

MALICIOUS

PDF

93.8 KB Created: 2020-08-03 23:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edc7b79ba379e2f3a3bf7c017d04494e SHA-1: ec306bc6a8da5c8a6ca000c3c2f0c6a9dc29f99f SHA-256: e8b2ca31ea8d6f5defdcb5e2ad75533b94f5d68cf35a356213a4cf0494fc7e88
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=congenital+gastrointestinal+disorders+pdf', which is also flagged as a malicious redirector. This suggests the primary intent is to lure users to this malicious site, likely for phishing or to download further malicious 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.com/pify?keyword=congenital+gastrointestinal+disorders+pdf
    • http://files.seanhuttonmusic.com/uploads/1/3/2/6/132682655/3cda6b7f4f1a1a1.pdf
    • http://files.adnz.org/uploads/1/3/2/6/132681398/7387605.pdf
    • http://betazemob.kofc1947.org/uploads/1/3/0/7/130775612/6849553.pdf
    • http://files.tenoaks.co.uk/uploads/1/3/0/8/130874058/midekojepanizoji.pdf
    • http://files.manchestercitytantricmassage.com/uploads/1/3/2/6/132681199/fawuwigugiva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0432/3409/9362/files/50919179395.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/73475837946.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/halliday_physics.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/weather_underground_st_peter_mn.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/4263373040.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/sulamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/50494747654.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/add_ocr_to.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/9563755646.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1015/files/bosch_serie_6_washing_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/gixamewufedugisegopatig.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/30756571291.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013310.bin
44fc9ea81fcc51f768d07f28136dec0a154f93d80b7d7f0b5dc989613040dba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 5112 bytes
font_01_sfnt_off00014482.bin
af04e69c5a7cb9362f6ffaee2b76dc0d8417c6da31085a546162386ac97ac87b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14482 10844 bytes

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