Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b52d8810b32520…

MALICIOUS

PDF

61.5 KB Created: 2020-08-19 04:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68005068b9e71da716a78b20442ee411 SHA-1: a166153405f88f72d0dcb3bfb3fb18e2be078a47 SHA-256: c9b52d8810b325208b597c7b80ad8c9b89a57727aec0f537c6a655aa13717692
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=boboiboy+video++free', which is also present in the heuristics and URLs. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=boboiboy+video++free In PDF document text
    • http://bivof.rainsweptgame.com/uploads/1/3/1/6/131636725/7ec3947447bb1d.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/1/0434/0878/5562/files/44847471300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/9622065904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/pikajusavefos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/dynamic_stretching_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/gta_online_best_apartment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2741/4695/files/41564277963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/geophysical_survey_in_archaeological_field_evaluation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/48440296067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/tekavuminekijas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/jadojitukuvozu.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 1

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_off0000b44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44C 4832 bytes
SHA-256: 4a9429708f408b6c37da5cf54fb50dd1d6fd241bf16a30dbafc40cea3c86b921
font_01_sfnt_off0000c4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D8 10228 bytes
SHA-256: 217b9d77010e3ab2ad80d3f6afb6e21cfc7a9071c1e9adf129cb9a70b43373a7

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