Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef90f06d851b947…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 07:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cb565f8e0b426d366fc8cee93133078 SHA-1: a8a66718f5460e540456f08ecc080e1b809c6215 SHA-256: 1ef90f06d851b947839d098935e3a02e2ec21b92a5248b9742bc8d3457945be7
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to a "Yahoo Japan app apk". The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=yahoo+japan+app+apk In PDF document text
    • http://lapomunit.disabilityinindiana.org/uploads/1/3/2/6/132681495/zajoperepag.pdfIn PDF document text
    • http://files.maximumvelocityathletics.com/uploads/1/3/1/3/131383791/bitarepaji.pdfIn PDF document text
    • http://files.alqudspub.net/uploads/1/3/0/7/130740349/99766.pdfIn PDF document text
    • http://files.gopremio.com/uploads/1/3/1/0/131070733/6095372.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/1/0428/6880/1695/files/libros_para_colorear_por_numeros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3302/files/83633138422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2020/2663/files/sinuvuwas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/17528747810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/tiginogoninagidome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/vanikojadiwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/tujifakomopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/crazey_frog_ring_tone.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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_off00005597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5597 4700 bytes
SHA-256: f91ff01e945e3efd034102a6e1ad31da58de7e1aaedcc45429b1a995f1fc07fe
font_01_sfnt_off0000659a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 10072 bytes
SHA-256: b4397980d2b91e2ddf59ffab3d91b9b293d64b8192e90e2ac9fc11d50cba569b
font_02_sfnt_off0000884d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884D 16364 bytes
SHA-256: 6f5c9c755000aa117ad9db832b333373f5bcccd37bafda2c2e9bcfb2eda1c367

Open this report in the interactive analyzer, or submit your own file for analysis.