Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9150327291b2da…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 00:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1420b61866411850a17cd7a38e53f07d SHA-1: e9ffb333a6d07b5943b551d5004428fd566d5d40 SHA-256: ad9150327291b2dadb8db6b7cb596bbaf1832000881f37df9b89e5116fb4e5cf
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=distinguish+between+basic+and+applied+research+pdf
    • http://files.newsummitacademy.com/uploads/1/3/1/3/131378990/c10b66e7.pdf
    • http://files.havenartistry.com/uploads/1/3/0/7/130738641/7a283.pdf
    • http://files.tccwadsworth.org/uploads/1/3/1/4/131407968/ximegelid_rirutisogugira_lanige.pdf
    • http://gefevinu.eakahane.com/uploads/1/3/1/4/131407818/sopureziwidam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/45476720496.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/18554723167.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/92723489611.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/lixadakufudezela.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/50851747359.pdf
    • https://cdn.shopify.com/s/files/1/0435/7983/4531/files/.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/lefotojer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/guarana_dosagem_usual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/fitidegev.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e1c.bin
1b59f037b5e36ed4d33108be53d294d1e0fb7f60e53301bd2b913486338d95a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1C 5648 bytes
font_01_sfnt_off0000715c.bin
a967b6726fec03ef9d08ce09ac595115d6a33339fd3f345015ed9391172fed45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 11368 bytes

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