Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b50c382d791b40…

MALICIOUS

PDF

50.2 KB Created: 2020-08-14 21:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd19a8f0ce56d796fe415c584827be0d SHA-1: 8fd47eac28382bb8f8899d54fe9ab1f70666782b SHA-256: 57b50c382d791b406909af88e2c3949ab12f2ea4af3406d71ded561fcc7832c1
202 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains associated with link farms and redirectors. The primary malicious URL, 'https://ttraff.cc/pify?keyword=build+your+own+gaming+pc+guide+2018', is identified as a malicious redirector. The document body, though partially garbled, contains text related to a 'gaming pc guide' and includes the malicious URL, suggesting a lure to entice users to click the link. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, and 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=build+your+own+gaming+pc+guide+2018 In PDF document text
    • http://files.kittywatchjapan.com/uploads/1/3/1/1/131164351/jufirixetofividoluk.pdfIn PDF document text
    • http://files.artronshop.com/uploads/1/3/2/7/132740260/futapiv-zajufedodufo-kisurozoluxi.pdfIn PDF document text
    • http://files.edinburghexpert.com/uploads/1/3/2/6/132695602/8784596.pdfIn PDF document text
    • http://files.bronzebeautylounge.com/uploads/1/3/1/4/131482941/8103760.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/1/0431/0096/2967/files/ps3_horror_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/60539623191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/vatagixenizonuporofodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/cours_d_amortissement_degressif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/ranowufupusajifurazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/10039269540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/gewab.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 7

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_off000077a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A1 5780 bytes
SHA-256: 8535f264612be7b64cfca182890ec2159de2879b8334ccfc46ee453634be1a95
font_01_sfnt_off00008b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3F 10196 bytes
SHA-256: 99507e8f9a456fd60a56e345ca09817c075189deb61490e082ac98888d8313eb
font_02_sfnt_off0000ae32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE32 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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