Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34a4e2f670e0e97…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 12:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 644ad16403f94d93a8e135a970cf8af7 SHA-1: ed77e2466a253c992b50091dbb792b3013b3463d SHA-256: c34a4e2f670e0e97d488affb6f2604c094dfd086e8a66010c32312562ef3ef0b
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', suggesting an attempt to lead the user to a malicious site. The document body, though partially corrupted, contains text related to 'ejercicios de enlaces quimicos resueltos 4 eso pdf', likely a lure to make the document appear legitimate. The presence of numerous links, including a confirmed malicious redirector, strongly indicates a link-farming or phishing attack.

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.ru/pify?keyword=ejercicios+de+enlaces+quimicos+resueltos+4+eso+pdf In PDF document text
    • http://files.mylifeinchange.com/uploads/1/3/1/4/131482819/2880625.pdfIn PDF document text
    • http://guzam.txroyaltyphotography.com/uploads/1/3/2/8/132816066/8938652.pdfIn PDF document text
    • http://files.3djoes.com/uploads/1/3/1/6/131636725/mamebaramewe.pdfIn PDF document text
    • http://files.virginialangum.com/uploads/1/3/0/7/130740524/tetegokitir_xenenopegam_sasanibajapufi_vijupamamapeb.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/1/0431/5525/9560/files/pegumugedozuniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/logewugezexabij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/beej_socket_programming_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/65479170801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/conservacion_de_los_elementos_bioticos_y_abioticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/62917269965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/tutejaxodopotetizoras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/1447982542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/xilaburav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/peragimirojefezusub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.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_off00006693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 5548 bytes
SHA-256: 11e3bba16e3fea9eac4fc318333d2210eee5fe7c953cc15e14cfe9309118f9ed
font_01_sfnt_off00007966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 12016 bytes
SHA-256: 49f55aab613acd9b61b4a72e121574fd4375c66f5d88249164b036c198c0f3f9

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