Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf316ad53a65d42b…

MALICIOUS

PDF

40.2 KB Created: 2020-08-08 12:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b42b3b55e036eb54baf1c8b59809c53f SHA-1: c0080701a389a0bb6136632eefa67d28470b7c0e SHA-256: bf316ad53a65d42b2090f76cbd963402334d524b6db66a13697b0fbd7beabe74
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary redirector identified at 'https://ttraff.com/pify?keyword=afcat+2+2020+pdf'. This suggests a phishing or scam attempt, leveraging the document's apparent relevance to 'Afcat 2 2020' to entice clicks. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was largely unreadable, but the presence of a malicious redirector is a high-confidence indicator of malicious intent.

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=afcat+2+2020+pdf In PDF document text
    • http://files.hard2faze.com/uploads/1/3/1/0/131070859/ef988bf.pdfIn PDF document text
    • http://files.ahta.info/uploads/1/3/1/3/131381003/rekogin.pdfIn PDF document text
    • http://files.lsten.net/uploads/1/3/0/7/130775870/mugelosewunubupa.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/1/0432/1778/0896/files/47416576023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/chief_keef_albums_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/30019222646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/dabepipavusalitox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/53308621592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5891/1649/files/complete_key_for_schools_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/39860336663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/sarudelur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/craftsman_lt_3000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3071/6314/files/pitch_class_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7659/7400/files/43208257513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/cambridge_o_level_english_language_past_exam_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/leisure_bay_spas_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/95537100058.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
🗂 Part of campaign: ahta.info 3 samples

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_off00006066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6066 5104 bytes
SHA-256: b1e39266177b1bdeb4f2394227ac9bc7a119112ec0bf66472fce39239b3f328f
font_01_sfnt_off000071e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 10028 bytes
SHA-256: 73846550c2a785d8e95658045b6a55af3ce7249b43a2d8809b740b6a2fbc6540

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