Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e374679d4c6d55…

MALICIOUS

PDF

100.2 KB Created: 2020-08-09 22:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f64815b97f9ae79872358ab6b264a239 SHA-1: a04554e5d94822b5fa1185ffefecc512cb8dfc8e SHA-256: 18e374679d4c6d553345f0167987e01e59bc17e6717a77dafb8484cee2b2db73
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for phishing or to download further malware.

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=chapter+11+to+kill+a+mockingbird+pdf In PDF document text
    • http://files.stephenmazujian.com/uploads/1/3/0/7/130738928/3725725.pdfIn PDF document text
    • http://files.travelwithkalsi.com/uploads/1/3/1/0/131070827/512140.pdfIn PDF document text
    • http://files.ulrichhoeche.com/uploads/1/3/0/7/130740298/2502780.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/1/0429/7195/5351/files/96169427437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/97726489357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/52349365464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/xometarazaneve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/31912579871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/6043838296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0429/7375/files/14664798277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/luxolomugovamijujewir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/vijerideda.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 5

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_off000140b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B7 5456 bytes
SHA-256: 04f1a059a3dc09a9c0bac837088a1d2bb187bfb3104dae30c9f215afedcb0b0f
font_01_sfnt_off0001531e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1531E 10008 bytes
SHA-256: 7bd28e45618f547c551398de0fc7308313a3277e3d9b92e67b9efe77e734ca0d
font_02_sfnt_off0001753c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1753C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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