Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc91e3c393b9ca7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-08 18:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b7294898612abde3cd038dc5ca577a3 SHA-1: 3af6250fdfd642f340e8f490a534a3642c5cb9d4 SHA-256: cdc91e3c393b9ca73681162d9dee1d137d48f683ca930b4aa58a1b930a525661
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users to a malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains references to 'Atkins fisico quimica pdf' and 'wkhtmltopdf', suggesting a lure for educational content. The presence of numerous external links, many pointing to Shopify domains, indicates a tactic to obscure the ultimate destination and potentially leverage benign-looking domains for initial distribution. No scripts were extracted from this sample.

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=atkins+fisico+quimica+pdf In PDF document text
    • http://files.gimmeshelterofsmithfield.com/uploads/1/3/0/9/130969580/29a7060.pdfIn PDF document text
    • http://jepate.cannongriffindesign.com/uploads/1/3/0/9/130969723/2858382.pdfIn PDF document text
    • http://files.barnumbayyachtclub.com/uploads/1/3/1/0/131070207/2452857.pdfIn PDF document text
    • http://files.leterbark.com/uploads/1/3/1/8/131856358/mavogufonopot-sofujeno-tunodubapebo-mozatixije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/nativewax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/kataden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/zygor_guides_latest_version_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/ramumufurilalorun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/40983948895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/mozuzikexuliripu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/82124546057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/gezolelewap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8197/4435/files/96170964986.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 5116 bytes
SHA-256: 1f444a54a48d437a2d40b26b3d0a113acfafe512e28978d0895a31b446171bc5
font_01_sfnt_off00006dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC2 10684 bytes
SHA-256: 9a5fd050313c66b0a778727d03777cd38b11790a358f7e92c8bb9198eb2af9d7
font_02_sfnt_off000091cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91CB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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