Malicious PDF — malware analysis report

Static analysis result for SHA-256 608224ac601496a6…

MALICIOUS

PDF

38.2 KB Created: 2020-08-14 21:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62f376a8515247743ce7cc8bd6ed830d SHA-1: 2fb4e9d5da2611c96d4caa12cd46d8b3fee818a3 SHA-256: 608224ac601496a67cd67fa3ab16dd6d9fa5024fbe8073b6c7577ea9b14506ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to educational worksheets and a URL that points to a redirector designed to lead users to potentially malicious content. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to a malicious site, likely 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/wb?keyword=spanish%20preterite%20vs%20imperfect%20worksheets In PDF document text
    • http://files.freshairsat.com/uploads/1/3/1/4/131453598/jumisodi.pdfIn PDF document text
    • http://lutonixuw.lifessweetinc.com/uploads/1/3/0/7/130776046/7c49accf5183928.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/zemagoduxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/is_it_love_matt_answers_chapter_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/abn_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/81788563297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/brain_parts_and_their_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/doduposepufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/29537097969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7668/8799/files/nividanebagotoleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2598/9785/files/wizard_dungeon_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/feviluwomaf.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4989 5328 bytes
SHA-256: 64ad271e3b6e014b364cf0cca9cd5e1bb4c742ddf6cafd514814901c8c07367a
font_01_sfnt_off00005b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 10444 bytes
SHA-256: fac9efd18a113b5a42f385d3f77e2faa8b0fd6879368d5c7ea32c9025777701e
font_02_sfnt_off00007dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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