Malicious PDF — malware analysis report

Static analysis result for SHA-256 c896028fbc21af3f…

MALICIOUS

PDF

46.4 KB Created: 2020-08-22 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8f7f6bd895a87755cabd66852123cfd SHA-1: 952705ae8c76f7261379a748455fe83edc13fbd8 SHA-256: c896028fbc21af3f64906b1c74dac3dc8e0b0297e67d3453daa0373d9474f163
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=android+auto+apps+not+showing+up', suggesting a lure related to Android auto apps. The presence of a link farm and ML classification further support malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=android+auto+apps+not+showing+up In PDF document text
    • http://files.kyharvest.com/uploads/1/3/1/4/131407274/janimozonesowonoduwa.pdfIn PDF document text
    • http://tazaz.tandem-cyber-solutions.com/uploads/1/3/2/8/132814975/0a8b45eb.pdfIn PDF document text
    • http://files.leighbivens.com/uploads/1/3/2/6/132682787/lagebutoluwimu_dekawamej.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/1/0437/2371/8824/files/zitesowedemiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/aditivos_alimentarios_colorantes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/11779541945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/cancionero_guitarra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/vowekafalowirediniduxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7294/files/28416877628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/19761767858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4809/0272/files/kenijivorowewiwifo.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_off00007705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 5272 bytes
SHA-256: 07ecdc601bade9f0a4350bf7e8c5b5561722b10c5bc4b5aad16c2de1944ed675
font_01_sfnt_off000088f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F9 10548 bytes
SHA-256: d7fbdb5f49d092efff840c66d9af757fe151ec30f07669dce1600e0d0aadf4d2

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