Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba4e143d633cfea…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 20:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e41a0806cb10448443b260814d25a42b SHA-1: dafcce6b497f571dfecabc920a4bb1af0afbe1e6 SHA-256: 8ba4e143d633cfeacad21529d37472e81f551bb9a8f1d8b4bea73012b6da532c
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to drive traffic to malicious sites. The document body, though partially garbled, contains text related to a 'free cv template for teaching assistant' and the malicious URL. The primary malicious URL is https://ttraff.cc/pify?keyword=free+cv+template+for+teaching+assistant, which is likely used to redirect users to further malicious content.

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=free+cv+template+for+teaching+assistant In PDF document text
    • http://files.beautydetangled.com/uploads/1/3/2/3/132303147/xivugi.pdfIn PDF document text
    • http://files.sl-ltd.com/uploads/1/3/1/3/131398461/ba3737f7cf.pdfIn PDF document text
    • http://files.venturissolutions.net/uploads/1/3/1/4/131406202/6165f2dbc2.pdfIn PDF document text
    • http://files.peaceofmindcolorado.com/uploads/1/3/1/3/131383719/9804295.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/1/0434/6488/4384/files/tarorobabojor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/glossary_of_history_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1348/0343/files/79200760365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/59668391055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/77737399999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/free_mahjong_connect_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/28215451927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/16289121926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/pontiac_firebird_repair_manual.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_off00006cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB4 5444 bytes
SHA-256: 0d49ee7a5443c20d2c37514bc70e52afac0750b3c2783c9ed3eccf9d5ab2a356
font_01_sfnt_off00007f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F22 10008 bytes
SHA-256: b071c60be540c113fafa37184b5e80db694b09cf50df0ec3956047f3635e5eac

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