Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dca57d350a1afa2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-01 20:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 240171e5c427d76f3c7b1b7fec0801eb SHA-1: 1a0346121404c0365414fde0de798c3b410eae12 SHA-256: 5dca57d350a1afa2d274e610cde1b821b88af77ce28e39a8902df084aea27b85
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to a redirector service that is flagged as malicious. The document body text, though heavily obfuscated, contains the string "Steam download speed", suggesting a lure to trick users into clicking the malicious links. The presence of many PDF links and a redirector indicates an attempt to host and distribute further malicious content.

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=steam+download+speed In PDF document text
    • http://files.hughsonchronicle.net/uploads/1/3/1/0/131071157/1d9843cb.pdfIn PDF document text
    • http://files.joeantico.com/uploads/1/3/2/3/132303351/62187fc733f7e3.pdfIn PDF document text
    • http://files.journeythroughsurrogacy.com/uploads/1/3/1/4/131406537/fenuwa_zonepeku_rewoxuferomona_rosonokefex.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/1/0431/3215/8116/files/julelajewapesekazujowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/16419615914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/fusadenavigasif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/56205250078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fasexerogetotano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/85373864390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0391/2098/files/lusoxififarirema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/56957593600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/kinogosazuvizerixuzune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/26719056259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/pawaripafuzewudosezalarag.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 3

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_off00006469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6469 4944 bytes
SHA-256: 11b33346164cd1d7276edd84bfdd5e1d9926b1432a308741b2831b80c9a33785
font_01_sfnt_off00007530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 10052 bytes
SHA-256: ada9bb416489594b5f095010250400f330344b2b37edae142e8a86686e1fe638
font_02_sfnt_off00009784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9784 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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