Malicious PDF — malware analysis report

Static analysis result for SHA-256 057ea525fb4a907e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-01 11:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 733b24d43ed4a6b8b1480ad38ac24154 SHA-1: 3734f6138f2ea02447c29cbd48dae2101811ac2b SHA-256: 057ea525fb4a907eddf99d5608a28169f7bcb6051e8698635e974c561cdffd4a
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, includes text related to the 'Occupational outlook handbook 2016 17' and the 'wkhtmltopdf' application, suggesting a lure to disguise malicious links. The presence of many external PDF links, some benign and some unknown, indicates a link farm strategy. The primary malicious intent appears to be redirecting users to potentially harmful websites.

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=occupational+outlook+handbook+2016+17
    • http://files.hdihidupsehatkaya.com/uploads/1/3/1/8/131856907/nuwod-jaterurup-duzalivar.pdf
    • http://files.justallgoodthings.com/uploads/1/3/1/4/131406797/busad_duwumabujer_mixodedoted_motomip.pdf
    • http://files.janinemillerdelany.com/uploads/1/3/0/9/130969278/6755478.pdf
    • http://files.cjhookah.com/uploads/1/3/1/4/131413718/zobujozaxuzukazutepu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/xegelapibetefewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2270/2999/files/nevemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/76028616902.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/files/xiwogajuxopipoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/43688141357.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/41066831627.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/cx-_10c_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7207/7475/files/famakuxulazebamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9489/files/6523375291.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/wegadojejekurobezeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7922/0891/files/70700899829.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_off00005a7d.bin
e33970951adfec50d4d3361fee27274c13b13d5c2860141c87665d57f042d71e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7D 5676 bytes
font_01_sfnt_off00006dc8.bin
0c4a3177c175dbbd86200028da039cc2fcd38614b5f38bcc84b0d22cba0be009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 10228 bytes

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