Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c807440fc1bddd…

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 05:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41bf651b503dba698107715573e0f372 SHA-1: 503431ff6f378f564cedf29d86e25e81e928dfc0 SHA-256: 83c807440fc1bddda3095e801061b6b993c9506b091606136c13a0e8d416b4b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'company performance analysis pdf'. The presence of a malicious redirector and a large number of external links indicates an attempt to drive traffic to potentially 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.ru/pify?keyword=company+performance+analysis+pdf
    • http://files.marysmathers.com/uploads/1/3/1/4/131438423/dbf43af53.pdf
    • http://files.campusconnectsoftware.com/uploads/1/3/1/8/131871687/tatotudave.pdf
    • http://files.jewelspridebengals.org/uploads/1/3/1/4/131414561/sagigimejeke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/adeste_fideles_spartito_accordi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/mcgraw_hill_ryerson_grade_11_chemistry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/moss_adams_pediatric_cardiology.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/44191062433.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/gobezalafenura.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/49108872216.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6229/files/paxaxulusozifarukagum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/mupozomikerabogatakonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/37088679239.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/152987314.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/rojuzo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e15.bin
ee26ccd44a942e63eb233787259fb1368063f0dfa934f2b3e881ce14f55c973f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 5308 bytes
font_01_sfnt_off00008012.bin
360e40ae485d04f77390722de7f06babedd7a3f3b8576c9839e3d0b4e968c3b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8012 11092 bytes