Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d307f6efdf2114…

MALICIOUS

PDF

44.5 KB Created: 2020-07-28 15:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4f51373fb99ed823e7976f6ed094d2a SHA-1: 391ac7bc1b697ca023ee775efabbfe0fb718fb9b SHA-256: 28d307f6efdf2114746c1304eb27aa052d1418fac4d471df87b849d6b4682ef7
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'mandated reporter in california', likely used as a lure. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious sites, potentially for phishing or malware delivery.

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.com/pify?keyword=definition+of+mandated+reporter+in+california In PDF document text
    • http://files.wellingtoncricketclub.com/uploads/1/3/0/7/130776118/tilakapalixameparij.pdfIn PDF document text
    • http://files.cedarchestrockport.com/uploads/1/3/1/4/131453896/568175.pdfIn PDF document text
    • http://files.forwardsolutionsmalta.com/uploads/1/3/1/3/131380848/poriwezageziware.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/1/0439/5171/8558/files/84769057545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/gabebosivivitemiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/nafixukozizepagorufuzulir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/bofafegiwed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8136/6685/files/24268896620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/57496887686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tebofaxajixak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21800621301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/mogufaxusokikafibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/55777449220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/subixutuji.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 5

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_off00007180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 4912 bytes
SHA-256: 1c206ea054fe1ec0d8a9c95213ab95896fa8885da22d604f70af064618c94e15
font_01_sfnt_off00008212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 10180 bytes
SHA-256: 7a6b21b4a17d7163e506233be804825b4ec25d800f3eaad38f7e2e96c4b747e5

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