Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1ae735cfe13b6e…

MALICIOUS

PDF

48.1 KB Created: 2020-08-22 06:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6fb14026bd9501b9520bcb173109028 SHA-1: 3e6a278cb027f1bb992a87fbf651e856fac0dff2 SHA-256: 7f1ae735cfe13b6e970480ab6171423408192cc7b20dde8a8758815be45e425b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to a malicious site, likely for phishing or to download further malware.

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=babul+ka+ghar+chod+ke+film
    • http://files.ballardbanjers.com/uploads/1/3/2/3/132303388/fogekumen-vagopiririmeb-taxinifus.pdf
    • https:///a10.gacanacana
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/analecta_biblica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tusag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/1853968549.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/23825012702.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36103472339.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/38472005832.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/zezuxefoxabimuxexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5934/6582/files/daperixugawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/62638846632.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/32767940088.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7601/files/galvanic_corrosion_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/2384165173.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/65224279385.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_off00006194.bin
10c97b1fbf915ac9a472a95117feeeaa6e800171a236f25244b2a130ee82494c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 5508 bytes
font_01_sfnt_off00007426.bin
447d20815fcc45b0493fe654fc54ef1714c3be628afd2a2620018da5236ce466
pdf-font-stream PDF embedded font (sfnt) at offset 0x7426 14436 bytes
font_02_sfnt_off0000a228.bin
177834fdae8ec6b248e4bcff64964fa19c31e1f549450a41ae6eb7dda90af704
pdf-font-stream PDF embedded font (sfnt) at offset 0xA228 4776 bytes