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)
MD5: bd0346ebd975ec950cdd1f97428c3695 SHA-1: c7b5cda7b7fe3965aa47191bf270166d8f59f14d SHA-256: af8112b17ad4423b128951aad647354451650399d4a7426bb918c22a4c918435
150 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 3

  • 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.
  • 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
    • http://files.yourkanegroup.com/uploads/1/3/1/6/131606408/sezafib-tofigunupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/dopetofafuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/jopepavawukex.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/gamepuweperiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/rudujedapobaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/characteristics_of_audio_visual_aids.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/17642763724.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/fomomukik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/53263177538.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/kimiwadidivomupulemusolaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/wavowanubedujuparaxula.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/47807533343.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 5

Files carved from inside the sample during analysis.

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

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