Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a83f5f2a796534…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 04:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76a7a5fec4ebd054740e1e9417bbbf79 SHA-1: 4a9633fbf0b66c0cf278f9f6ba1419bae5774cf0 SHA-256: f9a83f5f2a796534c0d6ba2c4c33584357a2b839b23ebda0496018ec75f5439d
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The PDF also contains a link farm heuristic, suggesting an attempt to manipulate search engine results. The presence of a 'download button' lure further supports a phishing or malicious download attempt. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sap+businessobjects+business+intelligence+suite+pdf In PDF document text
    • http://files.monitorseis.net/uploads/1/3/1/4/131406437/sesanet-kulodujubiw-kirabev-pokameb.pdfIn PDF document text
    • http://files.bristleridgellewellins.com/uploads/1/3/1/4/131407315/geguwos.pdfIn PDF document text
    • http://files.colliquecuffs.net/uploads/1/3/1/4/131483138/9278445.pdfIn PDF document text
    • http://mujemoseg.tomhelp.us/uploads/1/3/1/4/131407440/3594047.pdfIn PDF document text
    • http://mitifatel.pamelaharrisonpoet.com/uploads/1/3/1/0/131071164/8317983.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/1/0430/7487/9641/files/bilimut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/35934516637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/95187812450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/21847746700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9675/1774/files/verodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/geforce_installation_failed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/31728869952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/wabikovawanuromojax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3432/8735/files/epme_e4_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/new_functional_training_for_sports_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/2819896830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/23519629287.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 5548 bytes
SHA-256: ba8c864be6d9377a08d4638607f34402f34e94b174b0d669c1740debf1728a6c
font_01_sfnt_off00007af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF6 10760 bytes
SHA-256: f78e0295edfd466142e933412ec8de0f832045e9d976795df24668f5f77ff81d