Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15b60b83f9c425d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 01:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c357d990667a9e56975807da01ad31b SHA-1: b22131fa22e5b6a9160e11199eaf1661ed1e2c97 SHA-256: f15b60b83f9c425d577e3a7b9a3de3434b965c31821e40279f1be260dad9832c
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=math+grade+7+book+pdf`. This link is presented to the user as a lure, disguised as a "math grade 7 book pdf". The document also exhibits characteristics of a link farm, embedding numerous other links to PDF files, likely to improve search engine ranking and distribute malicious traffic. 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.cc/pify?keyword=math+grade+7+book+pdf In PDF document text
    • http://files.neokymamessinias.org/uploads/1/3/0/7/130738970/tikazan.pdfIn PDF document text
    • http://mujefulob.blythewaltrip.com/uploads/1/3/0/8/130874085/firavopujuponozasuk.pdfIn PDF document text
    • http://nabot.sharifmatar.com/uploads/1/3/0/7/130775997/wilozegilukonitov.pdfIn PDF document text
    • http://files.seasonalshowers.com/uploads/1/3/0/7/130775145/varubebun-wimitudelejoba.pdfIn PDF document text
    • http://neburura.fournildejean.com/uploads/1/3/1/4/131453870/xitipaxevuz_davawaxovubigug_banipotizegase_tugajariribiz.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/1/0430/4489/6925/files/80465595856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/3103215990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/bass_guitar_notes_on_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/6769766475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/25563153400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/nginx_access_control_allow_origin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/35925521886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2539/9971/files/financial_formulas_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/49797514025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/donirawubovawaxuxuzasup.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_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 5384 bytes
SHA-256: 3f11890e48adb22be8c6f4280d636cdb0661782dfbd1e9d2c1c733ef5db99c2b
font_01_sfnt_off00007638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 10368 bytes
SHA-256: 12bb3d4102ec8dcce80a05e15b85a3e755f06148770f1aba09dd620100ba982f

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