Malicious PDF — malware analysis report

Static analysis result for SHA-256 1914fbb4a2f57dc7…

MALICIOUS

PDF

47.9 KB Created: 2020-08-01 09:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d4962d78350af0496957f4885fbccdb SHA-1: 8accee91aeaf07326f6e8ad1a2371d0cb47b2dae SHA-256: 1914fbb4a2f57dc7f338cf1ba56bd2504f28c6e3df0e8c24066350905302c8c0
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=mac+ps3+controller, which is likely the primary lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, suggesting a broad distribution or SEO poisoning attempt.

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.cc/pify?keyword=mac+ps3+controller
    • http://files.yourdfwattorney.com/uploads/1/3/0/7/130776206/menilukeriperipu.pdf
    • http://files.dental-medical-connections.com/uploads/1/3/0/9/130969768/wakitexol-zimiramujexuvov.pdf
    • http://files.brendacarseyart.com/uploads/1/3/0/7/130740112/pumidibedaselabe.pdf
    • http://files.nestoncc.com/uploads/1/3/1/8/131871621/nazadekuxikolewovama.pdf
    • https://cdn.shopify.com/s/files/1/0435/8402/8833/files/jexesesaduxegoxovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/gomaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/zomuzawadotubisel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7660/7390/files/modern_operating_systems_3rd_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/79908519113.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/47162977872.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/37114818546.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5461/files/77568075574.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/64150578292.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_off000061a4.bin
50bd8db5ff9a0f03ea6ac0366ab4ff273dceb6ff0c6101ac0faff1fd52ccc92d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 6168 bytes
font_01_sfnt_off00007146.bin
a0dbfaf1664df01f58a86d39b2daef493524debc434b004aa23a8c78d862e41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 4836 bytes
font_02_sfnt_off000081b0.bin
b477a065ad99c837c50c0091effb0b0046b74777ac9b02105e96a3b7c0bade8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B0 10080 bytes
font_03_sfnt_off0000a439.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA439 4324 bytes

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