Malicious PDF — malware analysis report

Static analysis result for SHA-256 c399640073d1022e…

MALICIOUS

PDF

43.4 KB Created: 2020-09-21 08:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df2c31e8d39b5d1e2b8777d2d36b71a7 SHA-1: 29051df938bfff0b57169a04b701929e3f775032 SHA-256: c399640073d1022e28e3f2e4fffe0bc0a4b60d6ace911b802f307539255b8579
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=ppsspp+gold+emulator+games+apk', which is also flagged as a malicious redirector. This suggests the primary intent is to direct users to potentially harmful external websites, possibly for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/wix?keyword=ppsspp+gold+emulator+games+apk
    • http://files.mehlmansmunchkins.com/uploads/1/3/0/7/130740517/nisiwosesuk.pdf
    • http://mitupa.sandwatchfoundation.org/uploads/1/3/0/8/130874566/debez.pdf
    • http://files.gratiotfarmersmarkets.com/uploads/1/3/1/6/131637896/finoxaminimufuziga.pdf
    • http://jisuvis.beulahjoy.com/uploads/1/3/1/0/131071041/kavojosela_bogefa.pdf
    • http://files.thehopechestil.org/uploads/1/3/0/8/130874379/neleza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/19661778364.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/5399885702.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/bridge_over_troubled_water_free_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0462/2997/9285/files/zararawojamazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2406/files/37412010303.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7183/files/watoxodozoruromoludafulul.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/estado_catatonico.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0319/files/gowasedepof.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/orca_bite_force.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/bonare.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004915.bin
61e3ee2716a09b4281a8c80d5c019c27b82cac3a3fb2d1cb732acdd8a51a0eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4915 5072 bytes
font_01_sfnt_off00005a58.bin
13b6788a253db8f6526c8f4faff649c5a7d4b8a7bb2938bcdbb25d66131271f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A58 9896 bytes
font_02_sfnt_off00007c6f.bin
6bb81105deaa07772e3cb7d7982ad8558b1e4f4d6384bb10d037f0db3be5bf28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6F 16460 bytes
font_03_sfnt_off0000923e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 4324 bytes

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