Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ff9180a58e3e49…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 04:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90f74bdb84fa50502d358ef15cf33c4b SHA-1: 8e8043be32211dda3a779fc780d686e2842d7978 SHA-256: a1ff9180a58e3e49314b341e20694c74fca9d77bebe7fdc84b32af323e134a3b
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent link, "https://ttraff.cc/pify?keyword=pharmacotherapy+casebook+9th+edition+pdf+free+download", is identified as a malicious redirector. The document body, though partially corrupted, contains text related to a book title and download, reinforcing the lure. The presence of a link farm and a malicious redirector strongly suggests a phishing or malware distribution attempt.

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=pharmacotherapy+casebook+9th+edition+pdf+free+download In PDF document text
    • http://files.hawaiiislandevents.com/uploads/1/3/1/4/131453215/85c86b.pdfIn PDF document text
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdfIn PDF document text
    • http://files.liftnrolltowing.com/uploads/1/3/1/4/131452887/824787.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/1/0435/2226/1143/files/bofal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9512/8216/files/mavelawipobunoduxesur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1786/1280/files/43944709857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/mitosis_stages_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/10867811066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/basezexewejolobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/pokinudofeluzul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/97883530800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/mubijamemarazetadete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/fedimorirok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6461 5736 bytes
SHA-256: 7ee7bf90084b5d6faac6d8c75dfbe912c1a0abcd83c004a9558a2edd0ae1cbde
font_01_sfnt_off000077c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10484 bytes
SHA-256: fcae9d488c7984ad94c552ca1440b02d9a9cca1bb893c31715b2a621ff997aae
font_02_sfnt_off00009b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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