Malicious PDF — malware analysis report

Static analysis result for SHA-256 838cc73c382f49e4…

MALICIOUS

PDF

48.2 KB Created: 2020-07-25 19:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3004998de8cb9f001c20a614795e963c SHA-1: 6214a0d3a89b49e11d3a0009413aac139040f7c6 SHA-256: 838cc73c382f49e4e696506f777aada084624c6d3a149e152fb16d05a14de15c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically `ttraff.cc`, which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Android bottom sheet animation', likely a pretext for a phishing or malware download. The presence of a link farm and redirector links indicates an attempt to distribute malicious content or phish for information.

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=android+bottom+sheet+animation In PDF document text
    • http://files.in2uceremonies.com/uploads/1/3/1/3/131398268/33ac1262fc.pdfIn PDF document text
    • http://files.thebeloitphilosopher.com/uploads/1/3/0/8/130873958/cc3e8364.pdfIn PDF document text
    • http://files.gillysplaceinkefalonia.co.uk/uploads/1/3/0/8/130813667/3983028.pdfIn PDF document text
    • http://files.centroppsf.com/uploads/1/3/1/4/131483281/0889737b80f35f.pdfIn PDF document text
    • http://files.4bardworkingdogs.com/uploads/1/3/2/6/132681150/zojif-pekerasus.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/1/0435/0273/1430/files/67056036907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/repipamumemeputu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gasowezigubufavowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/warumuxexixovevudukage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8708/5220/files/22545392912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/42858343507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/7391394383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/vubotera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/78416307521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/83062731345.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 5

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_off00007b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B11 4948 bytes
SHA-256: f42a2c1bdd7af0f72823862338cc5687cc0086e0febc1ba12cc663f718bbeaf4
font_01_sfnt_off00008ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA2 12440 bytes
SHA-256: a99d20b423c817a757ebb7154e8e5a4cbe1110aeec8bb86bb2e5c1dffc6cfb6b

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