Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6c159052f6d342…

MALICIOUS

PDF

53.4 KB Created: 2020-08-26 13:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e11e2b440ddf76d36fed384e78759df6 SHA-1: 42be7907fe423eab95940bd2d2d5d63771c9b3f2 SHA-256: bd6c159052f6d342c299a7b58c02eeabb1db66927f0b006d45921a6e45fb38c2
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to `https://ttraff.com/pify?keyword=cambridge+ielts+6+listening+test+4+answers`. This URL is flagged as malicious and is part of a link farm designed to lure users with seemingly relevant content. The document body, though heavily obfuscated, contains references to IELTS listening tests, reinforcing the lure. The ML classifier strongly indicates maliciousness.

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+ielts+6+listening+test+4+answers In PDF document text
    • http://files.westwoodelementarypta.com/uploads/1/3/2/6/132696146/voxabiv-jadiziw.pdfIn PDF document text
    • http://motelo.anavantage.com/uploads/1/3/0/8/130874565/4645fa6.pdfIn PDF document text
    • http://files.onceuponadreamllc.com/uploads/1/3/1/4/131438176/3501dff3e0d5.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/1/0430/5515/3303/files/wopajifeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/20918272688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/64014689865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/applied_econometrics_with_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/39319962869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/nagonobojepadiwob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/air_pollution_causes_and_remedies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/35590910141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/10759953665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/66089594102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/favefiniwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0042/2819/files/list_of_short_vowel_words.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_off00009139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9139 5524 bytes
SHA-256: ddd440adea0254744e9032c5658ef212d31d92347a3382a1a6de0b8f9a8e842d
font_01_sfnt_off0000a401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA401 10704 bytes
SHA-256: 680dfd41f2d4e1408b2202d58ed557ebd3f3c5474080d344a4630481f63fd2aa

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