Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa56e439d7483a3…

MALICIOUS

PDF

57.0 KB Created: 2020-08-03 23:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd35fba40bf55873d04ce55e80d02c7a SHA-1: 3170c3e6b07d1f9c049f075e66cb51db89ec05bc SHA-256: 4aa56e439d7483a35157fd783866677032892e937fb3bccec05c4350bf2f67e4
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 partially corrupted, suggests a lure related to 'algebra questions pdf'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or scam attempt. No scripts were extracted from this sample.

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=sat+heart+of+algebra+questions+pdf In PDF document text
    • http://files.store.sssus.com/uploads/1/3/1/8/131856247/502cb8.pdfIn PDF document text
    • http://files.graydensolman.com/uploads/1/3/0/7/130776864/panukatoxi.pdfIn PDF document text
    • http://files.starlitelabradors.com/uploads/1/3/0/8/130814682/148ac06af4eb2.pdfIn PDF document text
    • http://files.tipsytulipdesigns.com/uploads/1/3/0/8/130813965/rediloz_pepipoweb_notoxewekeke.pdfIn PDF document text
    • http://files.thehistoricallouezsociety.org/uploads/1/3/1/6/131606789/mozixinaxabiginavid.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/1/0430/4571/6119/files/38690858784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/601152465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/12931784043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/vonugizigibosisaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/14551340701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3166/4552/files/national_certified_medical_assistant_exam_secrets_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/74748794084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/38324156919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/bobcat_s250_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/20959878369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/14475818643.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_off00009643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9643 5672 bytes
SHA-256: 451d446c3e3fce5a08ae5fe2263ce115fc6c8d5795fbf163784d038a734d4a68
font_01_sfnt_off0000a96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA96E 14412 bytes
SHA-256: 54bf37ddd95286ef515c9f0fb99a42cde85b4e629dce5aa07a66ebf1ab41f875

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