Malicious PDF — malware analysis report

Static analysis result for SHA-256 073a54d22fd49ccd…

MALICIOUS

PDF

52.5 KB Created: 2020-08-05 10:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f3735d1fef35c883519dc504f6f4529 SHA-1: 74bbb277dce1ac488c1c7e0f8d9f344121b21cf3 SHA-256: 073a54d22fd49ccd09568fed2a93362b4136a0ecc9e4b5be82f8508da9ccf457
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body text and embedded URL are identical, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm used to distribute malicious content or manipulate search engine results.

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.ru/pify?keyword=can+opening+a+pdf+be+harmful
    • http://files.gotchacoveredsc.com/uploads/1/3/1/6/131607331/sojorenonemaga_fetuvemiwe.pdf
    • http://files.philprobstcyclist.com/uploads/1/3/1/3/131398125/2753113.pdf
    • http://files.mindfulfootprint.com/uploads/1/3/0/7/130775866/8288962.pdf
    • http://rixusid.afterdivorce.net/uploads/1/3/1/4/131406286/putofolezo_nozoketa_mexaw.pdf
    • http://files.portlandrnsa.org/uploads/1/3/0/7/130775261/a3e3e2b2320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/puzusukosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/42092984280.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/leruva.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/zodubupusasadopubunifi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/7192977331.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5605/files/70440845131.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/kezigekurakarejexudibere.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/19922874993.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/38185676415.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/barycentre_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/52552491084.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/boss_katana_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/97815576550.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_off00009156.bin
47d66eaca229c8f22926857f4c614a9f77ecb03ac6b8ad986f65e8b3f8914570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9156 5320 bytes
font_01_sfnt_off0000a33a.bin
c8f9dc31702d4a9e53d85c894133ff9b405f1a608581a218c88ed17943237079		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA33A 9844 bytes

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