Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc37dafbfe78e806…

MALICIOUS

PDF

49.3 KB Created: 2020-08-15 14:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfa321388a34f1353cdc299d584b81b7 SHA-1: 5ef886a10e081edead89974d8eb3d1aa1c021bf0 SHA-256: fc37dafbfe78e8060b1a92d946b000c0de07f741c44bb1e2d5736249f2b78716
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded links that redirect to a malicious URL, specifically 'https://ttraff.com/pify?keyword=baseboard+heater+installation+guide'. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the installation guide lure and the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier also strongly indicated maliciousness.

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=baseboard+heater+installation+guide In PDF document text
    • http://files.hyunheedoh.com/uploads/1/3/0/7/130739170/4847156.pdfIn PDF document text
    • http://files.lbnchurch.com/uploads/1/3/1/4/131453429/a5c84.pdfIn PDF document text
    • http://xogixel.thewinestopper.com/uploads/1/3/2/8/132814930/e8076668b3bd1.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/1/0428/9835/8432/files/1028728638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/aeolian_landforms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/35060769614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/83322868174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/sakigudafalafimesapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8783/6822/files/celebrate_jesus_celebrate_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/merge_sort_complexity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/suniduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/65010760046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8517/1607/files/tisekulatukediwutowobi.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 1

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_off00007662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 5156 bytes
SHA-256: 401c8e12c5e683490bea77676936e7de4422040867e88b1db31de813c8ef47cc
font_01_sfnt_off000087d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 10108 bytes
SHA-256: a0e9ea7af46810e8863e653379e85fccc154a8d9d2e13f6b7c93d66ba832d052
font_02_sfnt_off0000aa76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA76 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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