Malicious PDF — malware analysis report

Static analysis result for SHA-256 0691d08f14cdea0b…

MALICIOUS

PDF

34.0 KB Created: 2020-08-18 22:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d78afbc556285544382e9860eb2d1ebf SHA-1: da63ae37af8eb05ad054f893458a8e90f042c9a9 SHA-256: 0691d08f14cdea0b61a3f97aeae4fad41d43e1ff4c825c6c1e9410a01929e295
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is an annual report, likely a lure to encourage clicks on the embedded malicious URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the 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.cc/pify?keyword=macquarie+group+limited+annual+report+2017
    • http://files.gzsartapalooza.com/uploads/1/3/0/8/130814124/pixifugif.pdf
    • http://sexuve.adventurepickle.com/uploads/1/3/1/1/131164250/tavagekifomazudepo.pdf
    • http://files.skipstonepublishing.com/uploads/1/3/1/4/131407549/eaa839.pdf
    • http://files.ezraacademy.org/uploads/1/3/0/8/130874231/mujajin_xixekak_pimawegabegej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/bsc_agriculture_subjects.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/93656972618.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/54833795610.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0924/files/92956610140.pdf
    • https://cdn.shopify.com/s/files/1/0440/1925/3413/files/wusalon.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/4063436479.pdf
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/mugatadowemuzetiki.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/jelupojiganun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/australian_animals_colouring_in.pdf
    • https://cdn.shopify.com/s/files/1/0432/2400/6820/files/zinewitekesifajufut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/5732592653.pdf
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/canard_pc_hardware_hors_serie_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/gojezebidide.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_off000047f7.bin
5aa2c903d7aab9a0f9daf6f577a4f96efdd539d985e80e4e8cf03aa57259250d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F7 5752 bytes
font_01_sfnt_off00005b7a.bin
6a3b104ddd0bd24966265937097726056a53ef57c6f759862705afddbfbba2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7A 9228 bytes

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