Malicious PDF — malware analysis report

Static analysis result for SHA-256 492de880b074ec4b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-26 11:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c690d49535a6ebac8aadbab09a86a791 SHA-1: 5790f9d681fa7d83d2496c940bee44add0d7a436 SHA-256: 492de880b074ec4bdee627761b20e8ac9bd27372fd7349df1c2d1471d206558f
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or SEO manipulation tactic, embedding a large number of external links, predominantly to Shopify-hosted PDF files. One of these links, 'https://ttraff.cc/pify?keyword=the+blind+watchmaker.+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure through deceptive linking, rather than delivering a direct payload.

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=the+blind+watchmaker.+pdf
    • http://lawixafo.ikhlastours.co.nz/uploads/1/3/2/3/132303093/9422080.pdf
    • http://files.mrsbscusd.com/uploads/1/3/1/4/131407155/zonutidigobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/13107694517.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/88479143432.pdf
    • https://cdn.shopify.com/s/files/1/0429/0081/6028/files/install_compass_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/mcdougal_littell_algebra_2.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/73626496237.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/bogolugadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/rise_of_the_guardians_full_movie_fre.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/leucipo_de_mileto.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/57817616149.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/falolefazaxapokekozopu.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_off00005e09.bin
b2164bb1ea9887824e21e363689448f72dde6e3869fa21f897a0d87a85d4b6d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E09 5492 bytes
font_01_sfnt_off00007097.bin
513d2c6795dd51d1a43e8d71014846b5ac4b578fa5c9ef5e8e6110feca280f50
pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 9964 bytes