Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99cc84addbd2012…

MALICIOUS

PDF

34.4 KB Created: 2020-08-21 19:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4a4c5c24533ca94787ee97c75d24a4b SHA-1: d76fcf47c44f10b5520b24668bdf05078105842e SHA-256: c99cc84addbd201234f2627adbea4c77ebab0fe24207ca0c31fc027bc8de1eb9
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one that points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a weather report, likely serving as a lure. The primary malicious link identified is https://ttraff.cc/pify?keyword=birmingham+alabama+weather+report, which redirects to further malicious infrastructure.

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=birmingham+alabama+weather+report In PDF document text
    • http://ledoder.cliniqueveterinairedecantley.com/uploads/1/3/0/8/130874631/kanetokudejebivu.pdfIn PDF document text
    • http://vobokiza.daniellebaldassari.com/uploads/1/3/0/8/130874284/8287390.pdfIn PDF document text
    • http://defewuwov.rhynotite.com/uploads/1/3/1/1/131163927/6512367.pdfIn PDF document text
    • http://zisuzaf.asfi2020.com/uploads/1/3/0/8/130814238/8e6a181c28.pdfIn PDF document text
    • http://files.alliancerestorationblog.com/uploads/1/3/1/3/131379792/8673654.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/1/0427/8976/5276/files/gegoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0318/1218/files/sexakig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/wagoxuluwuvaxudibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2629/files/vex_robotics_curriculum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/chemistry_practice_test_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/77050676211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/nadiwupadamuzosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/38216480413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/16202357643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/boyle_s_law_apparatus.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_off00004780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4780 5336 bytes
SHA-256: 918aa40cb29e6a6da7326b348b309c7300c1032dd6b150cc17b1ff8e3ae7d9d0
font_01_sfnt_off0000597f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x597F 10320 bytes
SHA-256: 040618eb2930701d86d8362261a421c214f7674736551e34698b5a466d0f41d7

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