Malicious PDF — malware analysis report

Static analysis result for SHA-256 8892067b1647806f…

MALICIOUS

PDF

67.2 KB Created: 2020-08-13 21:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3684fc687ce92a40de7b56b6fc925ca SHA-1: 114402b8540b16619c310a5f21787df3d780fa29 SHA-256: 8892067b1647806f63483d417dbdc20a9f2ae40f4be675232de692d3a84a0001
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with the primary one pointing to a known malicious redirector. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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=ecole+centrale+paris+formation+continue
    • http://korivego.blindandbeyondradioshow.org/uploads/1/3/1/3/131380042/fivaxonuri_wugome_napesa_jolifuwelo.pdf
    • http://files.bombni.com/uploads/1/3/0/7/130775520/6994652.pdf
    • http://files.jumaephotostudio.com/uploads/1/3/1/8/131871494/sewalokasubolon-gifare-woxuduvu.pdf
    • http://files.lifesrenderingsart.com/uploads/1/3/0/8/130815124/37d4b3e04e6e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/26928752234.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/96334026586.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/jafopamilinojejorifuref.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/matlab_image_processing_toolbox.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/learning_php_the_hard_way.pdf
    • https://cdn.shopify.com/s/files/1/0440/8632/9509/files/arduino_morse_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/bejofafopomego.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/vugazopevofuropojike.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/37490466841.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/satyanarayana_biochemistry_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/wimulujuloborez.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/dogumiranevesomog.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c15a.bin
6c52663fa57071f04e818700047a9a5791db5d31c309d079e682f5f6c8dcc647		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC15A 5120 bytes
font_01_sfnt_off0000d2a6.bin
d64816700f62d26547e3256574903841c2c71850af87b172a0622c58d0e4454b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 13812 bytes

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