Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dfa0ce5d0d8bd1…

MALICIOUS

PDF

63.8 KB Created: 2020-08-25 19:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b76cec54767f6bddada64451f61db8d8 SHA-1: 4ae1353f1e1f312c52337f3f1e1870cc25314f13 SHA-256: f1dfa0ce5d0d8bd1a262c4b5862b1b2d9eab3cc95208dda335d1fef0d82d5886
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to an 'algebra 1 chapter 5 assessment book' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm further supports the malicious intent.

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=algebra+1+chapter+5+assessment+book In PDF document text
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/3/131379899/47c1cb.pdfIn PDF document text
    • http://sifufepof.mahakaitreasures.com/uploads/1/3/1/3/131381241/vakozekurame_mukale_kafam_libuwasi.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/1/0432/2020/5726/files/12920779146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/38445985452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/72975400919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/gakuliguxazapidelifij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/fapaxixox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/yamma_yamma_kadhal_ponnamma_audio_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/43506940811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/3560340492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/birth_by_sleep_abilities_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/ruzasotevuruvivoxojife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/treatment_of_acute_myocardial_infarction.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_off0000b982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB982 5716 bytes
SHA-256: 7d611959deac5fe1e5c29e17c160190b7d94a806c8838571619a502f3d2fde0b
font_01_sfnt_off0000ccdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 10932 bytes
SHA-256: 3b3f3950ab262b74f035d4ef81e349d231620e93c1bf5a309592a31813741a00

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