Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d3e5bb36976f20…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 23:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d52a68027bfbbee846330747bf3a2c5 SHA-1: 3176c922467bd31dfb0888af1e1ae484ae463371 SHA-256: 87d3e5bb36976f20b7bb52c3e6ec63c1252336aa02a1978e46aa29add3bc5290
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically `https://ttraff.com/pify?keyword=cisco+hackerrank+questions+and+answers`. This URL is flagged as a malicious redirector and part of an SEO link farm, suggesting a phishing or scam attempt. The document body, though obfuscated, also contains this URL, reinforcing the lure. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=cisco+hackerrank+questions+and+answers In PDF document text
    • http://files.allstarskaraoke.com/uploads/1/3/0/9/130969748/7215338.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/1/0437/6435/1130/files/75886185458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9841/3987/files/vavug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/nelivawazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8123/files/gemukobutavifowumimaneja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/kuta_software_infinite_algebra_1_gcf_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/11239184873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/12513851824.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_off00005970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5184 bytes
SHA-256: fb4b821f3bca740eea16a37560512d0a65fdc14cf93ca9416c6eb793e38e24b8
font_01_sfnt_off00006b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0F 11524 bytes
SHA-256: 7d355cfc893d0d99ac4f3279a2815665fc892cb9918642f06f26a2558c5a7f3c

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