Malicious PDF — malware analysis report

Static analysis result for SHA-256 956bbcb8e31fbd86…

MALICIOUS

PDF

43.3 KB Created: 2020-08-13 04:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f900d19bdfd738e5e03d497a4a195aed SHA-1: 82bebdcdc4111ddd2f7e78130b8dde07187cc23c SHA-256: 956bbcb8e31fbd8659336eb163111684578f6be41365df67ebfafeaa22b480c0
194 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector, ttraff.com, which is likely used to distribute further malware. The document body, though heavily obfuscated, contains text that suggests it is a lure related to a 'Netis dl4480v1 manual'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm SEO tactic to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=netis%20dl4480v1%20manual In PDF document text
    • http://levem.darakutawp.org/uploads/1/3/0/7/130775803/2658490.pdfIn PDF document text
    • http://files.mrbevan.com/uploads/1/3/0/8/130874361/3542070.pdfIn PDF document text
    • http://puwepude.freesvgfiles.net/uploads/1/3/1/6/131606349/4e371e6a9e6d.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/1/0434/0829/4039/files/ferepezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5557/1356/files/miresawawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/argumentative_essay_topics_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/73094937716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/8867554339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/97620205751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/42576506762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/right_to_information_amendment_act_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7625/0776/files/fakalujigipubeposabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2410/5115/files/95606073050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/misevixunupojimarapiviben.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_off00005fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5380 bytes
SHA-256: 39ae1996e3d4cbc37938714fdd06a225db40d2fdd6a6a40913ceaf7980c5e31d
font_01_sfnt_off00007231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 15120 bytes
SHA-256: ee4473369caa24706c95597c20bbf9d2a8f9dd585861748c19bebc70236fe0e7

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