Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe071a112f2701b…

MALICIOUS

PDF

81.3 KB Created: 2020-08-03 22:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36a03f7188145bcb72891874c98c1cc8 SHA-1: b825f324b305a54ac6579e91e413b9ab10be1c02 SHA-256: 7fe071a112f2701b54f2e2f6b257603da21cf7764b6f51a3f6f6cb5505d5a640
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=morihei+ueshiba+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful destination. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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=morihei+ueshiba+pdf
    • http://files.shaktiflowyoga.com/uploads/1/3/0/9/130969089/tepaselasaxegel_dojolakuwi.pdf
    • http://files.vacavillelimousines.com/uploads/1/3/2/6/132695428/2402444.pdf
    • http://files.mrsduganshomeroom.com/uploads/1/3/0/8/130814914/marekarokifes-gagigutom.pdf
    • http://files.goldendark.net/uploads/1/3/1/8/131872238/sebulovosexovi.pdf
    • http://files.sdbvl.com/uploads/1/3/1/4/131454816/bezabuxozizuluk_guzurila_jowaluvimiji_finixinemuvaxij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5515/files/77074413570.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/21935531470.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/fokekilenakitelajisijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/ge_corless_phone.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/21289739997.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/puromozabodupulutotinoroz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/nolewasagovosesibulexuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4898/3959/files/shigley_s_mechanical_engineering_design_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5989/5717/files/39825892241.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/30546594700.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/377283787.pdf
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/gaduzadojobuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38e.bin
5bcb3d159ea64330b9563c4a874c3917dfa020ddd5d1b216d626a63881226538		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 9368 bytes
font_01_sfnt_off0001027d.bin
28b6fd389cc4d634db87de9907157d4c65a46db9261ad91c197e4bff4dc3d856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 5244 bytes
font_02_sfnt_off00011453.bin
88e00379159107cebfb355112132eea266c0b892083b3f90966fffe7401e48e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 10400 bytes

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