Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1c904b7fa0a92a…

MALICIOUS

PDF

55.6 KB Created: 2020-08-24 13:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 725e549dbacb26bb6c7d63f0b856f2cf SHA-1: 263b433fb67cf9b83cf6152a98952d5784bab497 SHA-256: aa1c904b7fa0a92af2ee8feb22f46cd157174d6e5ca8e12f6b61d4bc5ff30e9e
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to lure users to potentially harmful content. The primary malicious URL identified is https://ttraff.com/pify?keyword=chhaila+bihari+sadi+song. No scripts were extracted from this sample.

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=chhaila+bihari+sadi+song In PDF document text
    • http://files.maketheeffort.org/uploads/1/3/2/6/132695321/mijod_wegiretujajug.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/1/0436/8593/7307/files/botibasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/gagovonadusigefivara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/anlise_swot_definio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/app_store_limit_lte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3718/7493/files/80360895692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/behavioral_decision_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8938/6901/files/98391702076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8568/4897/files/vibiluseliniku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/suvolotejikut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/fugomizusefidabujepev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/bhangra_dance_punjabi_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/2587105495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/chrome_os_crouton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8459/5610/files/1n4007_diode_datasheet_vishay.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 3

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_off00009167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9167 5132 bytes
SHA-256: 4b7b331fc74799a21b46d4c0ddf7b8b687a3ee29f82fdb73a0cc6508bd62772e
font_01_sfnt_off0000a2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C4 14528 bytes
SHA-256: 5ca76181dbb42ac85b105f297eb74418c85e6849d50a764994310609d6ad975f

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