Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa34f156a28510ab…

MALICIOUS

PDF

41.0 KB Created: 2020-09-10 03:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ab32422304498d63267724e04aed1da SHA-1: e116e41d3346772e18dc749bc62effb6b6d137d5 SHA-256: aa34f156a28510ab56a1521448f7f1cbed84ccd65fe2a42dca3b50e7247f9aa0
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates these links point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are consistent with this finding. The primary intent appears to be directing users to malicious sites, potentially for SEO spam or phishing.

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.club/pify?keyword=identifying+solids+worksheet In PDF document text
    • http://files.queensnycellphonerepair.com/uploads/1/3/1/6/131636984/tevemora.pdfIn PDF document text
    • http://files.utadrc.org/uploads/1/3/1/3/131384098/2557117.pdfIn PDF document text
    • http://files.lucaturrini.com/uploads/1/3/2/6/132695306/5aca2.pdfIn PDF document text
    • http://nanif.lasvegasymf.org/uploads/1/3/1/0/131069934/pabutatubon_xovepaboveniz_nixomoxovududam_xodikabonovuwog.pdfIn PDF document text
    • http://files.cweissworks.com/uploads/1/3/2/6/132696174/c31faa7d.pdfIn PDF document text
    • http://pilubape.tatry-group.com/uploads/1/3/1/0/131070420/ef1456d67923ff.pdfIn PDF document text
    • http://files.green-hopefoundation.com/uploads/1/3/1/3/131398555/zedugov.pdfIn PDF document text
    • http://weniwomo.rhynlight.com/uploads/1/3/0/8/130873998/573762.pdfIn PDF document text
    • http://files.mightyscholarspreschool.com/uploads/1/3/1/1/131164488/5486528.pdfIn PDF document text
    • http://files.bmhcounseling.com/uploads/1/3/0/7/130739366/fafijorikidon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/430cb2_79c0a17cb7e041c5b4c0d1d6e55b2ba0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2ddd39_7674b3b58d904434821ecbc7edeb92c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f16bd_1ad6f3445e90496fbac9f43c8be9bc29.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c3d6a_5aab30a639514663a183f5f11bb3e4b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/963627_2e784395115641e893602c1d86960c9a.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_off0000621c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 5156 bytes
SHA-256: b02f971a5a1c50a23fef014b7a6dfd10f065ce57b1343e04f3529ce8d2472bb0
font_01_sfnt_off000073bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BF 10184 bytes
SHA-256: d9ad54e0f6b1b2704188d5cc5a30780a8251106d9709231107a531588a11b3b9

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