Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8112b17ad4423b…

MALICIOUS

PDF

61.5 KB Created: 2020-08-22 17:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd0346ebd975ec950cdd1f97428c3695 SHA-1: c7b5cda7b7fe3965aa47191bf270166d8f59f14d SHA-256: af8112b17ad4423b128951aad647354451650399d4a7426bb918c22a4c918435
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for distributing malware or phishing pages. The document body and embedded links suggest a lure related to downloading a game, which is then redirected through a link farm. The primary IOC is the redirector URL, which likely leads to a malicious payload.

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=shin+chan+game++free+apk In PDF document text
    • http://files.yourkanegroup.com/uploads/1/3/1/6/131606408/sezafib-tofigunupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/dopetofafuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/jopepavawukex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/gamepuweperiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/rudujedapobaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/characteristics_of_audio_visual_aids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/17642763724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/fomomukik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/53263177538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/kimiwadidivomupulemusolaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/wavowanubedujuparaxula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/47807533343.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F70 13640 bytes
SHA-256: ae3e665e4934f86081bfe1aeac854d0027fc28d11b94bf54d33954f2d9f7f507
font_01_sfnt_off00007c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C43 5384 bytes
SHA-256: e852b91634cf3f72764da2964d9437ae127f915f3cea52fcddfba8ed60e4a14a
font_02_sfnt_off00008e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5A 8680 bytes
SHA-256: 4b2c53a9ebca111f0a79c18847404ec6f91ab95fb2e56e143fb4380dc69c5511
font_03_sfnt_off0000a69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA69B 13528 bytes
SHA-256: 0020c1463c658c3afa2dc94bc65ff3088b7c085a262e1d5ce15bf3867025a200
font_04_sfnt_off0000d1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 16076 bytes
SHA-256: 14ac3c0da7f97e7f50296a36adbdf9b7b4c425ba83d352f3172dafecc6cd8b86

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