Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ef8a99ebb50bc3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 04:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd1de827a96bea2088e9e0d610bc6568 SHA-1: f3387eb12c6f1d2645c80626acaa5f58446b4793 SHA-256: a7ef8a99ebb50bc33e40265ee676790d218ca13d9c4a18f7f0dce7edd44aca06
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'K-on episode 1 kissanime'. This suggests a phishing or social engineering attack aiming to redirect the user to malicious infrastructure. The presence of a link farm further supports this, indicating an attempt to manipulate search engine results or distribute malicious content broadly.

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=k-+on+episode+1+kissanime In PDF document text
    • http://files.schwarzgoldce.org/uploads/1/3/1/0/131071256/tadukisevamenowor.pdfIn PDF document text
    • http://files.jenniferritaahern.com/uploads/1/3/0/7/130775462/puguve-nanizovuw-lisujubewe-kureziro.pdfIn PDF document text
    • http://files.apartmrome.com/uploads/1/3/0/8/130814874/8930754.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/1/0441/0081/2952/files/borderlands_3_null_pointer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/42704223080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridikesomuzumiburowafex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/us_open_tennis_2020_women_s_draw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/84311043910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/weider_home_gym.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/tales_from_the_loop_rpg_rulebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/80119425562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/66034262030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/39260476878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/sofufiwukoxejoxetej.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4C 3288 bytes
SHA-256: c01daec8fd945e90ae9c450be4cc07a0a9f08c04577fec827de38dcc6077cb0e
font_01_sfnt_off000068f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 5096 bytes
SHA-256: 3e3c9c4ad59f89983e43c18a6f982283c78232cf61c7fced99d164d33db078d1
font_02_sfnt_off00007a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 9364 bytes
SHA-256: a7ca02ea883c656baff8e723fdd2674c1a31f68eac7d2912df74bf634cc988de

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