Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f0bd874279d7bb…

MALICIOUS

PDF

55.6 KB Created: 2020-09-03 00:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c15a2add2c4cabc8caaee98c089e2412 SHA-1: 266412ba955a1b0b41f8123e5f21f3d9b08fbec4 SHA-256: 76f0bd874279d7bbda12921ff918337a5d870a74b501f7f8ff05034370b43d28
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to academic topics and a URL pointing to a malicious redirector. The presence of multiple links, including one to a known malicious redirector, strongly suggests an attempt to lead users to harmful 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.link/wix?keyword=formation+of+male+and+female+gametes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7935/8869/files/functionalist_theory_of_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/14188154998.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/15171885255.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/how_to_get_photoshop_for_free_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/xuxigazowaxudonevuxivew.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/34045890521.pdf
    • https://cdn.shopify.com/s/files/1/0460/0525/6353/files/fetesujazubanijad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/5637473993.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_cefc1b37b65d454b8ee480f71ddf391c.pdf
    • https://static.usrfiles.com/ugd/ae059d_d18b990c1e3c439b8cfc731d9ac1542e.pdf
    • https://static.usrfiles.com/ugd/b8c837_70209ecf8df547a0b5b7f501f24cfb0a.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/57025655725.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/91799927087.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b9a.bin
097570ee71baec071ad8dfa4b52f0b9b445f4f2d5d0b20e6b33fb1bec5c59662
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9A 4972 bytes
font_01_sfnt_off00009c5e.bin
d84716194d3d111d5a22e0eb0241ab58687f6b02ea8a09573b2f5c0e68eea36a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5E 11716 bytes
font_02_sfnt_off0000c3b4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B4 4324 bytes