Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a5c31c0da1cc50…

MALICIOUS

PDF

33.3 KB Created: 2020-08-01 06:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64bc152c6a17e0838ccc2ad5db680ff2 SHA-1: d5d43c172c1a1bf8f60639ceed88560c9c16ef62 SHA-256: a0a5c31c0da1cc50b31f1fdbe21a758ee94bb4c1f17f34cb9ec544c8b1963890
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources hosted on CDNs and other domains. One critical heuristic firing indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to a 'computer science cheat sheet' and the malicious URL, reinforcing the lure aspect.

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/pify?keyword=computer+science+cheat+sheet In PDF document text
    • http://files.friendsofdeddingtonlibrary.org/uploads/1/3/0/7/130739664/ae93003c33.pdfIn PDF document text
    • http://files.coreyrobinsonmusic.com/uploads/1/3/0/7/130776822/396689.pdfIn PDF document text
    • http://files.balthazarconjure.com/uploads/1/3/1/3/131381881/vajot.pdfIn PDF document text
    • http://files.wolfemountain.com/uploads/1/3/1/3/131398188/5ae3580e1.pdfIn PDF document text
    • http://files.laurasmithauthor.com/uploads/1/3/1/8/131872269/8578037c.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/1/0437/2732/3301/files/zawetizudapuwavesubak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/36688984310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/52766915088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/40655402039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/1996_jeep_cherokee_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/wenedutemoderigugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/84188728149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/63908049928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/49970582615.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_off00004707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4707 5048 bytes
SHA-256: 4448ab456c7632f931fdf0cb2e9089d581aa6f06c4e171375a852fecda48767d
font_01_sfnt_off000057fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57FE 9636 bytes
SHA-256: 7853a864184547e6be70716501f9f860cea4b1e07269e04f716e80519a9bb73b

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