Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c3cd79bbf9e4df…

MALICIOUS

PDF

42.5 KB Created: 2020-08-09 01:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b02e868e9900f28fb769e67c0b687a5 SHA-1: a14b6278320d2c022cf686f93580ee132a61d7cf SHA-256: 42c3cd79bbf9e4df9c46e5efd37b97f99f9afdf1e451891d219afde5dca39322
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 of which point to a redirector service. The primary malicious URL is https://ttraff.cc/pify?keyword=difference+between+descriptive+and+prescriptive+grammar+pdf, which likely leads to a malicious payload. The document body, though heavily obfuscated, contains references to the topic 'Difference between descriptive and prescriptive grammar pdf', suggesting a lure to entice users to click 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.cc/pify?keyword=difference+between+descriptive+and+prescriptive+grammar+pdf In PDF document text
    • http://files.erikawharper.com/uploads/1/3/1/6/131637570/manexozitiruzesus.pdfIn PDF document text
    • http://files.dangerforce.com/uploads/1/3/1/3/131398145/bitelovutonixun-lagufuvet.pdfIn PDF document text
    • http://files.riveroakslearningcenter.com/uploads/1/3/2/3/132303020/5b5eba15.pdfIn PDF document text
    • http://files.thebarktales.com/uploads/1/3/0/8/130873826/034df741d.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/1/0429/3070/0455/files/60426211091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/biblia_jerozolimska_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/airbrushing_and_weathering_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/motel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/levud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/alternative_to_plastic_bags.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/42365080085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/59547652288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/56986993118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/an_enthusiastic_gilled_blob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/gikobupodatojed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/meat_shop_business_plan.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_off00006659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 5736 bytes
SHA-256: 34c4766f54fb6d36126f77acf7831663f260cbbc49dd1f8bf47ea417baa76428
font_01_sfnt_off000079ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EA 10564 bytes
SHA-256: dc34a1e65e62d3e860037fa9cb4089afa5f50f9ee307bb2628d9382ccc9c826c

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