Malicious PDF — malware analysis report

Static analysis result for SHA-256 880ec215553e4949…

MALICIOUS

PDF

58.0 KB Created: 2020-08-02 07:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f63931984c9f003b794cf417e6cd52 SHA-1: 5a97ccec57a4e01a6ea9503771580c730b5bd7f3 SHA-256: 880ec215553e4949dc1976f2be3b2fb8e615dd599370fd2a2cfe080f056e5645
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely used to funnel users to malicious sites. The presence of numerous embedded links, including one to a known malicious redirector, suggests a phishing or malware distribution 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.ru/pify?keyword=sonic+rpg+games
    • http://files.idpathfinders.org/uploads/1/3/2/7/132712011/pivebi.pdf
    • http://files.scarboroughresidentialalternatives.ca/uploads/1/3/1/4/131454262/dimebiravud-vitit.pdf
    • http://files.inspiredayurveda.com/uploads/1/3/1/0/131070331/59ae4143bd.pdf
    • http://files.columbianacoc.com/uploads/1/3/0/9/130969404/wewobopadisexam_dunutogo_jijowijeg_jizujudovowive.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/16297197690.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/sapigut.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/36993812674.pdf
    • https://cdn.shopify.com/s/files/1/0431/1397/1861/files/16508976190.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/nitusotexetabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8167/files/98061617433.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/zazidorivikuwed.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2885/files/defobapikotevibosafero.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/tureweju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/binary_tree_vertical_order_traversal.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/zifabugasut.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/mubovudu.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_off00008306.bin
3322823e339f1fd933bf472a485dd6b3d49185c537dc664513be3b88587516cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8306 5500 bytes
font_01_sfnt_off00009643.bin
70010f853ecc6765975af7292a4c49ea60eb2f6721e9c53303377ef9918eacfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9643 5032 bytes
font_02_sfnt_off0000a729.bin
ccc035a97a45adc3689deff9e61d9a134fea701f14c59b1ffd6cdd51b7116534		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA729 10924 bytes
font_03_sfnt_off0000cc87.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 4324 bytes

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