Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f71101a27c95183…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 07:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5dcf299cf1a3385868ad4201c4672e96 SHA-1: f84b11de4a9a5e830382c9e346e9ab6ecb881bf0 SHA-256: 7f71101a27c951835dc5ccfec05ea239f02acdebb9ecadf1dabb41f6b628497e
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for SEO spam. The document body and heuristics indicate a lure for free downloads, specifically mentioning "Adobe photoshop 7.0 smoke brushes free", which is a common phishing tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links to potentially malicious or SEO-spamming sites supports this assessment.

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=adobe+photoshop+7.+0+smoke+brushes+free In PDF document text
    • http://fodum.ewtechteam.com/uploads/1/3/0/8/130813669/00c206dd.pdfIn PDF document text
    • http://files.corriveaucreations.com/uploads/1/3/1/3/131383434/zekuzafeve-fider.pdfIn PDF document text
    • http://files.pawsplayground.co.uk/uploads/1/3/1/6/131606890/jirijawumijux.pdfIn PDF document text
    • http://telenije.lightfactorystudio.com/uploads/1/3/1/3/131379552/rupiwikubexixu.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/1/0428/0595/2671/files/validity_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/networking_devices_tutorialspoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/zewexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3642/5883/files/anemia_hemolitica_autoinmune_diagnostico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6845/1992/files/ceh_certified_ethical_hacker_study_guide_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/53507733794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/hebrew_alphabet_flash_cards_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/tuwipirowejik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A39 5488 bytes
SHA-256: cbcb11f09fe73f3709e15ba91ef1c5596d5357ce9ae273e4459d1b902004b489
font_01_sfnt_off00006cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD0 13732 bytes
SHA-256: ece57aed44662056e7900a419d921130262e4e60aac182f4527927472f84fc59

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