Malicious PDF — malware analysis report

Static analysis result for SHA-256 de174ebc8c2a3812…

MALICIOUS

PDF

32.2 KB Created: 2020-08-04 02:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a5de51906121b8fe8cde410bd59fc4a SHA-1: 323f56ca4d8da12e283180cd5a23e6b3a2e06a18 SHA-256: de174ebc8c2a3812a07f111b807d89bb07545fdf37e23acf4d7bb34de401bd57
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=cambridge+igcse+ict+revision+guide+pdf, which is likely used to redirect the user to a malicious site. The document body, though partially corrupted, contains keywords suggesting an educational lure, likely to disguise the malicious intent of the embedded links.

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=cambridge+igcse+ict+revision+guide+pdf In PDF document text
    • http://files.eloconsortium.org/uploads/1/3/1/8/131857983/pawilopilifu-mitegezes.pdfIn PDF document text
    • http://files.greenlabelhome.com/uploads/1/3/1/4/131406840/9590574.pdfIn PDF document text
    • http://files.storyclothdatabase.org/uploads/1/3/0/8/130874593/xesixaki.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/1/0435/4323/2661/files/52272009598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/zalav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/arquitectura_renacentista_caracteristicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8197/4435/files/cambridge_english_unlimited_placement_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/vetevikovirenuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/duwigogogetot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/nemabebipazuniwesojonam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/lovikagupoferepuzo.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 4

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_off00004128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4128 5548 bytes
SHA-256: cb7f545cf08dbfb080da7e83d92301e7b106d2deef160952b1c73c96df0f7985
font_01_sfnt_off000053ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53ED 9536 bytes
SHA-256: f14f21d2b939be401972bab411be3353e0503b64d5efd150f1770ca7a647677a

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