Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc85a9bdb98dc4ad…

MALICIOUS

PDF

45.6 KB Created: 2020-08-22 03:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d121a545b75c9cd18b43cb070c2854ac SHA-1: 216aef7b836e7dde0900fbca039d757164d3ef9f SHA-256: cc85a9bdb98dc4ad65a340b0e316823aa85e9522e90efc19b647aa3df214efe8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text that appears to be a lure ('Compulsion 2018 parents guide') and the malicious URL. The presence of many external PDF links suggests a link farm used for SEO poisoning to attract victims.

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=compulsion+2018+parents+guide In PDF document text
    • http://files.ahafonlinechapter.com/uploads/1/3/1/8/131871919/masegalov-wubuvukonib.pdfIn PDF document text
    • http://files.letsdansky.com/uploads/1/3/0/7/130738681/45531f6daf2ae3.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/1/0439/0833/3736/files/ghost_mushroom_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/wuxalejekokenofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/wejojelunevudopifeneno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/asciidoctor_maven_plugin_generate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/zejifoniredaxavowezawew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8595/3192/files/35455738036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3593/0273/files/market_leader_advanced_business_english_course_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/5764328097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/que_es_una_historia_clinica_psicologica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/2305719794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/bajamorotez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/44417846670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/avast_failed_to_create_rescue_disk.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 6

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_off0000728a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728A 5704 bytes
SHA-256: 627d0df22e80c00a416af48aeb1b53cf5371d748bbd7cb5f35f715038ca57861
font_01_sfnt_off000085da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DA 10456 bytes
SHA-256: 743670b35df02d7c4f17accd0e1f65fc700280bb013ae0955f5c2d237734cd61

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