Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9e947f9092f46a…

MALICIOUS

PDF

47.9 KB Created: 2020-07-28 23:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff32fdefc70534b14d6d5652f246b920 SHA-1: a5f2b1f63378b1cd475ac1127bf1bd18242de522 SHA-256: 4b9e947f9092f46a5865c7b2bb7cd99f31f5f883dfb812fcc18f43b7ce8e7647
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=antibiograma+pdf+2016', which is likely used to redirect users to further malicious content. Another heuristic identified a PDF link farm, suggesting a broad attempt to distribute malicious links.

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.ru/pify?keyword=antibiograma+pdf+2016 In PDF document text
    • http://files.burgerclubdubai.org/uploads/1/3/1/3/131379803/6877080.pdfIn PDF document text
    • http://files.111sage.com/uploads/1/3/1/0/131070469/48e077f6f4679c.pdfIn PDF document text
    • http://files.get2steeping.com/uploads/1/3/0/7/130739782/vipedofijujugeb.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/1/0428/9835/8432/files/85755015361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/49120570631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/podununoxisobigetinod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/96096184891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/gemesamigatar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/79360201011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/vedajozizukimogufuxorosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/wovirenajifeneri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3852/3047/files/pukexil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/38584994093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/56587197160.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 8

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_off00007a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 5428 bytes
SHA-256: 0124644ab3b6d0899974e90fd05157dde97e272c3d8199826c8e98265d0a3d6f
font_01_sfnt_off00008c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 11360 bytes
SHA-256: 9e6ee860680404441611b5f6471eb7d3d05bad9fdc9a81b8e6eff1f99891e162

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