Malicious PDF — malware analysis report

Static analysis result for SHA-256 914239a71379b7a0…

MALICIOUS

PDF

55.9 KB Created: 2020-08-05 13:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43fad328a0a7b57ac2b4b3f10af77487 SHA-1: be3debeb720046efb7c2c4d9129459238bf6b763 SHA-256: 914239a71379b7a0f5ac992a83a4a663ccc2cf7194c5fd46b446e171bd2e013e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting the primary intent is to drive traffic to this malicious site. The heuristic firings confirm the presence of a malicious redirector and a link farm within the PDF. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=apache%20aircrew%20training%20manual In PDF document text
    • http://files.learningessentialsnc.com/uploads/1/3/2/6/132683017/397fad.pdfIn PDF document text
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdfIn PDF document text
    • http://files.peterstyle.eu/uploads/1/3/0/7/130775062/somip_wotagole_wurixitupovufuz_jugob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/hyperdimension_neptunia_re_birth1_dragon_claw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/wowawufugoxofuxezovonin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/anemia_sideroblastica_fisiopatologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/affairscloud_february_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/rimip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/81293846821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/fefijubibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/90698367541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/51776314228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3721/2319/files/77385220715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/nafabulinatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/zelajulivax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/python_directory_exists.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E3 5248 bytes
SHA-256: 177427eded3fdac2e0760193d7af267c550f17afaca499c4f043bcf7a9cfa4e7
font_01_sfnt_off0000a2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A6 15480 bytes
SHA-256: d6c3ae413db6448fb3e80c62a9f0019f7aec8b8cd4cec967614bf97452187d03