Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac485cf2066102f…

MALICIOUS

PDF

52.1 KB Created: 2020-07-28 13:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e2b44925b0fdc47694c2aa051c213ddf SHA-1: f49830f8de586ae6d25aff33a4bb0025f5a90210 SHA-256: 4ac485cf2066102f37ba083f7e4ad16120312c6428e495d58986844d0a266768
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, a technique often used to redirect users to malicious sites. One of the primary links, 'https://ttraff.com/pify?keyword=house+bug+guide', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure ('House bug guide').

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=house+bug+guide In PDF document text
    • http://files.floridapackages.ca/uploads/1/3/1/6/131607093/xefitezetabel.pdfIn PDF document text
    • http://files.urbanstreamecology.org/uploads/1/3/1/4/131453250/gulijiwekug.pdfIn PDF document text
    • http://files.westchesterswimofficials.com/uploads/1/3/0/7/130776037/656f20e8ea.pdfIn PDF document text
    • http://files.eatwithjames.com/uploads/1/3/2/3/132303317/8878586.pdfIn PDF document text
    • http://files.service-netflix.com/uploads/1/3/0/7/130775171/885062.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/1/0436/7400/9753/files/tiwozapipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/zakav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/vejowakujibabilasepol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/39240165766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/nawudujozexurunubeboje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/mugobovonulapikonafeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/95527549153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/xolafasolus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/91194755496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/31517952758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/xulosaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/buwerizowujaxumozapowo.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_off000091fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FE 4452 bytes
SHA-256: db6426a23875c0407ee149cac34c31e938523f954a3329e5247480b1f8c648ec
font_01_sfnt_off0000a118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA118 10088 bytes
SHA-256: efed04cb72f6435eb58066cb1a21f4112748c3552bdc12275548a1bf1807eb0b

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