Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1aa3d9792101a8a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 16:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c280fd8e39e77be5242f8a89d9ee912f SHA-1: 3503965dbe61a2fa788dfc3791f9669a905ef3e9 SHA-256: d1aa3d9792101a8a2873589ed021c22232005bdd09861bf51f89d95c4b7f04f6
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about industrial steam generators. The document also contains a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF with high confidence.

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/pify?keyword=generadores+de+vapor+industriales+pdf In PDF document text
    • http://files.danielsuniqueartforms.com/uploads/1/3/0/8/130813796/8770157.pdfIn PDF document text
    • http://files.lifeofastreetdog.com/uploads/1/3/1/8/131856318/poremitaw-werapudike-mapodap.pdfIn PDF document text
    • http://files.allinonepetcare.com/uploads/1/3/1/4/131452826/vekovof.pdfIn PDF document text
    • http://files.barnsandburleycandleco.com/uploads/1/3/0/8/130813528/ruzaf.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/1/0432/4936/9252/files/91280940555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/vajisekunotanawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/45743856591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/12681181068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/65243455259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/70986292551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/acs_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/gilowewofuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/fimal.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 8

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_off000068d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5128 bytes
SHA-256: 74dea547457937307f6afde6cc5f4d718ecb01adcc44bcdfc2631f7b7d3b0b31
font_01_sfnt_off00007a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 10680 bytes
SHA-256: 17ffe2d94e3b7d93f67870839963db314e369856105b3a14022c2e77586be7a8

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