Malicious PDF — malware analysis report

Static analysis result for SHA-256 373ac9dd8cc40ae2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-07 20:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d3995b1a0d4527ae2bff6aad33bfb66 SHA-1: 56ee75c7cf17a3c04ad5a63ff9ecf787174a6fae SHA-256: 373ac9dd8cc40ae2da12e645fcf6a8f1d7d70eb013af7ea73a62b2c9ac90b302
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a malicious URL, identified by the 'ttraff.com' domain. The document body, though partially corrupted, suggests a lure related to 'chemistry equation symbols pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=chemistry+equation+symbols+pdf In PDF document text
    • http://files.alexvann.net/uploads/1/3/2/6/132695418/121654.pdfIn PDF document text
    • http://bexofodi.meridianstats.com/uploads/1/3/1/6/131607062/julesubodatixunapad.pdfIn PDF document text
    • http://files.champagneandlinen.com/uploads/1/3/1/1/131163851/a437eb1a.pdfIn PDF document text
    • http://files.anyball.info/uploads/1/3/2/7/132741241/woxakej.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/1/0433/5117/9416/files/68632815621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/77739011283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9500/4070/files/redact_acrobat_pro_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/24026298782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/17753333112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/86232173678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/89453636073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/48421852099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8624/1189/files/koges.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CA 5552 bytes
SHA-256: fdd57465e5f091b3d392fd20a176f513c6ff4bd20fbd0232839d2fdf0e46e331
font_01_sfnt_off00007a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7B 10396 bytes
SHA-256: c130f23d79df2bb9b467bea26b7ea8ef0825e1f7dd0efa27219a37bf23213e1f

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