Malicious PDF — malware analysis report

Static analysis result for SHA-256 48353c1e92dfb831…

MALICIOUS

PDF

32.2 KB Created: 2020-08-25 05:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9b46a1c0d8bfc449863f11f31f4786f SHA-1: 366e449e9fbace64dfefa4c795e0651153e5d4d4 SHA-256: 48353c1e92dfb831ab831cd05cecb4878b270703e29c1e97b911e515edb6eefb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a Whirlpool oven manual. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, many pointing to Shopify, indicates a link farm used for SEO poisoning or traffic redirection. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

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.com/pify?keyword=whirlpool+oven+manual+timer
    • http://files.winnipeggroundschool.com/uploads/1/3/2/6/132695418/vekeronuvakigowopad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/13746257490.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/pimidebirokalimafapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/54365056613.pdf
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/56332461736.pdf
    • https://cdn.shopify.com/s/files/1/0432/6316/4580/files/libro_a_travs_de_la_biblia.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/rekobetowuviw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/ecological_energy_pyramid_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/gukikuvanosutane.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/nivibidukovul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/8786409371.pdf
    • https://cdn.shopify.com/s/files/1/0440/4055/2598/files/adivinanzas_para_nios_de_animales.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/animation_photoshop_action_free.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_off0000428b.bin
936a45cd25dd9ea4e83e22bb8666dfabc8487c392bba0649eeaf695f214be93c
pdf-font-stream PDF embedded font (sfnt) at offset 0x428B 4952 bytes
font_01_sfnt_off0000533d.bin
47a96226ce2e774e1fca7ceee1cf7464bac3253a10591895e811d4107b460a35
pdf-font-stream PDF embedded font (sfnt) at offset 0x533D 9792 bytes