Malicious PDF — malware analysis report

Static analysis result for SHA-256 892d0698b6a7a515…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 13:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 371cccdd8b89743fefb1e18fca60f3f0 SHA-1: a23bb0334fe9c8a4eeeb9e0d155c6d4704911f17 SHA-256: 892d0698b6a7a515fc932dfa0aaa14c42cf1ea0d9f7d58d5668c407b55cd008b
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=nfl+bettors+guide+week+4'. The document body also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely used to redirect users to a harmful destination.

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=nfl+bettors+guide+week+4
    • http://files.thecornerstonemarket.com/uploads/1/3/0/8/130874233/zidipasanigam.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/57833763321.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/zopez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/lojetunotibajuraje.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/rujifoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/alternating_current_vs_direct_current.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/tetaretenirubunuloka.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9936/files/cost_to_lay_vinyl_sheet_flooring.pdf
    • https://cdn.shopify.com/s/files/1/0462/3899/0485/files/consumer_report_best_worst_cars.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/daxupetesike.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/oracle_java_jdk_8_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/nanuvenufivudegakepojeki.pdf
    • https://cdn.shopify.com/s/files/1/0450/3240/7198/files/apocalpticos_integrados.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_off00005f48.bin
baf8bdd682d14aad298c28fef2c8823f0bd944dbef8a61b1fc5a604c42acc3b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 5220 bytes
font_01_sfnt_off00007135.bin
de53a83651e29c436bcd52962c4535e31af616a3b84837420ffda20ce2bcdd8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 10012 bytes