Malicious PDF — malware analysis report

Static analysis result for SHA-256 960ba34e865d3580…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 11:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b8be68bfe4bc56c6ec792b855ddbc4c SHA-1: 763e40d20f25d7d3cd26e9398e3d540b78a85678 SHA-256: 960ba34e865d35800fe436879fa69b7fd132513e57a19d73cb336bab6f397956
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious content. The document body contains garbled text but includes the same URLs found in the heuristics, reinforcing the malicious intent.

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=archimedes+of+syracuse+information
    • http://files.illlaladesigns.com/uploads/1/3/0/7/130740625/94f3e9ddfc.pdf
    • http://files.alleylouisville.com/uploads/1/3/2/6/132695575/cc617c80dfb6ed.pdf
    • http://files.zcsentinel.com/uploads/1/3/1/4/131408024/4392261.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/plural_of_sheep.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/3210531784.pdf
    • https://cdn.shopify.com/s/files/1/0429/1202/2691/files/vudilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/mujiwuwuputeparekigepevaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/94744327994.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/rorir.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4587/files/69615329925.pdf
    • https://cdn.shopify.com/s/files/1/0431/6725/2641/files/89352872348.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/91216463305.pdf
    • https://cdn.shopify.com/s/files/1/0437/0048/6312/files/63301014836.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/4865441262.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/25495482881.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/wobotaveki.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/98652557008.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_off0000602f.bin
e6075a8c8db1eefc6f1ca7d5becb88f5166fe353643d7efe7acb8f19f7f62769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 5320 bytes
font_01_sfnt_off00007221.bin
0fd5b8c12aebcd2a606b37d7d3384e03749779588719b0907a3fe9cc6d5d8fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7221 10516 bytes

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