Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdc01fc61a7a358…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 23:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c08ce33901f18eecf48c2c6540c2adb SHA-1: e7ec17a25b650315892a94701af8b491d1d037ac SHA-256: 3fdc01fc61a7a358f73c0f4a375d9aa481bee9f9dafa4695482cc9d972a821f8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/wb?keyword=comparing%20length%20worksheet%20for%20grade%201'. This suggests a social engineering attack aiming to lure users to malicious infrastructure. The PDF also hosts a link farm, likely for SEO poisoning or to obscure the malicious destination. No scripts were extracted, and the document body is heavily obfuscated.

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/wb?keyword=comparing%20length%20worksheet%20for%20grade%201 In PDF document text
    • http://files.highdefsalon.com/uploads/1/3/1/3/131381900/6712042.pdfIn PDF document text
    • http://zejoba.apartmentpropertytransactions.com/uploads/1/3/0/7/130775918/826c0.pdfIn PDF document text
    • http://mumifivux.eatonsbnh.com.au/uploads/1/3/1/3/131398453/0b5613e3028fbf.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/1/0428/9835/8432/files/3785448733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/76788399343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/kugejolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/bizenigomipisasowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/77083918171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/java_decode_base64_string_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/303018125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/16298866341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5081/8969/files/sedumoxufonaneritax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/40843306838.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 3

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_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 5568 bytes
SHA-256: 94999bd1d65698dff3ff8a44d58f3da4c5fa060bf1b566afce3bbdaa8ec3ca3f
font_01_sfnt_off00007295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7295 10520 bytes
SHA-256: be9d94dae9da8363db552114b268d16442af7791a2b66073767201983450b405

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