Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d3addae75ee384…

MALICIOUS

PDF

44.7 KB Created: 2020-07-28 03:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 202b0976b00f3664da26268cdb97a75b SHA-1: af321d427e8f230e93c959544857bc9dbb64e422 SHA-256: d4d3addae75ee3842d318d5156969a709dc9036cf631a69df40b70785a3225e6
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm pattern, with numerous embedded URLs pointing to external resources, including a suspicious redirector at ttraff.com. The document body appears to be obfuscated or corrupted, but the presence of the redirector link is the primary indicator of malicious intent.

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=2nd+conditional+worksheet In PDF document text
    • http://files.ingridpollard.com/uploads/1/3/1/3/131381802/lutuf_wegibakodu.pdfIn PDF document text
    • http://files.jmccarthyphoto.com/uploads/1/3/0/8/130874400/zanotan.pdfIn PDF document text
    • http://files.myincredibleangel.com/uploads/1/3/0/7/130740249/dbdf96a9f33f2a.pdfIn PDF document text
    • http://files.stemcells4ultimatehealth.com/uploads/1/3/2/8/132814286/fasuwisesa-dotasonur-jajelidawerig.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/1/0432/0378/8964/files/dibomagawobulod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/digonogegolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/70815726422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/97210510261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/kojitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/4045134719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.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 7

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_off00007170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 5008 bytes
SHA-256: 1b75b4077d3ede9461624c0372dfac3fe6496cca6738425c063ffcb60cc10869
font_01_sfnt_off0000826d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826D 10332 bytes
SHA-256: bc741d74b05017f5d805176e2d99482c5a2bb7d452e40a1ab9212276eb615b9d

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