Malicious PDF — malware analysis report

Static analysis result for SHA-256 75640d4935dd1f53…

MALICIOUS

PDF

47.4 KB Created: 2020-08-18 14:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb75c564cc7201b0de483303e993edf4 SHA-1: e0c572b6291cbc01ce7207ccadc715301d92bf8e SHA-256: 75640d4935dd1f533f1625ec3bc55e17b3e9d8855dc0f778762b1c2d15fd0b0f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to generate traffic. One prominent URL, https://ttraff.com/pify?keyword=bible+commentary+telugu+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity under a seemingly legitimate topic. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

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=bible+commentary+telugu+pdf
    • http://ruradoned.msmbnyc.com/uploads/1/3/0/9/130969060/moravabex_nutudenidexupe_subiwi.pdf
    • http://posut.reshootarchery.com/uploads/1/3/0/8/130874493/fafikumupo_punujap_xosevawozukabe.pdf
    • http://files.gwhsgroundscommittee.com/uploads/1/3/0/7/130739267/2649506.pdf
    • http://files.thecaruca.com/uploads/1/3/0/7/130775337/6f12e46fb.pdf
    • http://rudenofed.harlanhawkband.org/uploads/1/3/1/4/131483083/4312361.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/zovogafesejixutodafasiniw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/wazagaroxupekuzofisudaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/steam_activities_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/hormonal_regulation_of_carbohydrate_metabolism.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/modern_automotive_technology_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/kimisini.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/infinite_stratos_ova.pdf
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/15262335052.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/easton_arrow_spine_chart.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/28473309701.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/93705890760.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005269.bin
e9ae40df48d1dfc2505f0092aaa83a3feb13c94bdbbddaa4335c7dc4dacb8812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5269 5472 bytes
font_01_sfnt_off000064e4.bin
44983ba33b49fa29cb1beb0f3bb26442c7b59f91b0f8a2f9ae2cf796fb0bb43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 3296 bytes
font_02_sfnt_off000072ac.bin
ea2f63983c6dbd7e14f106b8632fa36d26d1747f55d266da3877126633da69a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 15368 bytes
font_03_sfnt_off0000a218.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA218 4324 bytes

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