Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f46f57b11e69b1d…

MALICIOUS

PDF

38.1 KB Created: 2020-08-29 21:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3191f7a54ae95fbe3495837edccd619 SHA-1: d6314f7efcece31046d4d4e40255525ab40f0dc9 SHA-256: 5f46f57b11e69b1da490705e286cca2d7109b561b457ba814422c86603c0cd23
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=libro+el+poder+medicinal+de+las+plan'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to Shopify-hosted PDFs. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure users through deceptive content.

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/wix?keyword=libro+el+poder+medicinal+de+las+plan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/wedel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/ravujopek.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/94487533054.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9837/files/zezufidoleko.pdf
    • https://cdn.shopify.com/s/files/1/0465/7614/0455/files/elite_dangerous_lawless.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/hampton_bay_uc7078t_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/63408336428.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/robert_half_time_reporting_login.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/pakistani_bully_dog_fight_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/40121931855.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/7366849479.pdf
    • https://cdn.shopify.com/s/files/1/0447/4021/4940/files/kutedelenuvavusomabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/varanomavumozomadeda.pdf
    • https://cdn.shopify.com/s/files/1/0457/7588/0348/files/albion_online_pve_tank_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/98433053159.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_off00004a10.bin
85e3851eb462bb61c5cb3e79a4b45d795ce3a72590577df724d9125eae243580
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A10 5300 bytes
font_01_sfnt_off00005beb.bin
75ea62995fc30f3b049542ab8e9b7cf9e9a4c1db3c63b181aba25c2ae248ef64
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 15180 bytes