Malicious PDF — malware analysis report

Static analysis result for SHA-256 1710f83c42605387…

MALICIOUS

PDF

46.9 KB Created: 2020-08-28 14:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abaeaaaba70276234b59207a01b772d5 SHA-1: 7369b91314cebbd81839ff6c7b69164afd40c292 SHA-256: 1710f83c4260538741287b7bf24266a3bc6c87a9e409127fdb26aa358b7cd6b8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=impact+league+of+legends, is identified as a malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly legitimate documents. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=impact+league+of+legends
    • http://nulan.holytemplec.org/uploads/1/3/0/7/130776321/301983.pdf
    • http://files.flintmetroleaguesports.com/uploads/1/3/0/8/130814387/sovomewaj.pdf
    • http://lufuxow.uteachtech.com/uploads/1/3/1/8/131856917/vinososojopuwovep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2919/8998/files/effective_javascript_herman.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/fisicoquimica_gilbert_w_castellan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/29124927493.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/nokekurufapixosusunudogex.pdf
    • https://cdn.shopify.com/s/files/1/0461/9223/0553/files/geologia_de_engenharia_abge.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8820/files/74398055397.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/4366683449.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/polusovat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/command_line_linux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8135/7725/files/example_of_imagery_in_romeo_and_juliet.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/48047916778.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/ramodufidogob.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_off00006c3b.bin
4c33465f6efe381d57456beefafba599c4204156e89bfae7f49ac8f558bc1eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3B 5148 bytes
font_01_sfnt_off00007da6.bin
42d44ba1c3eed1513b1d6fcabd64e9b111a2c5ae72b588f51f1a98e7ddc52157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA6 10404 bytes
font_02_sfnt_off0000a0d2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D2 4324 bytes

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