Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62ddf600a3f88bd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 01:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4795d442f891ad979a83bb668a10da7f SHA-1: 7846d3e7bc832297767fe2fe86b254d2c836a4d4 SHA-256: a62ddf600a3f88bd07429b39d83c319555a81dc188a6a898ac7f0951fbee2e0b
194 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, the PDF_SEO_LINK_FARM heuristic reveals a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary IOC is the redirector URL, which is likely the entry point for a malicious payload or phishing attempt.

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=bundle+in+android+studio+example In PDF document text
    • http://tefikosuf.terenceyoungnow.com/uploads/1/3/2/7/132741198/6104971.pdfIn PDF document text
    • http://files.paulsumich.co.nz/uploads/1/3/1/4/131438758/powevozoza-dajojezizamu-rojukomutigu.pdfIn PDF document text
    • http://files.chaminadechoirs.org/uploads/1/3/1/4/131407144/disoren.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/1/0459/6691/7792/files/70061641138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/energia_eolica_en_costa_rica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/81545034194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/pijefilusatigesamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8345/4882/files/tekazomidezujekevisefewuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/60841673145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3804/7388/files/4391345731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/94974493032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/52008671707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2059/7922/files/kafunagizifetawowidijal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/68209472611.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 8

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_off000071f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F9 5224 bytes
SHA-256: e6f250864dd9093f604e42b2c0ec6b378088375a019864be4a3cadbf8cf4377b
font_01_sfnt_off000083a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 10908 bytes
SHA-256: 9b9919ba04fbe17c532dcb16b656ee8f5d070c287edf2590ce80efa1b92eac41

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