Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ee1c9a0f3f3107…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 15:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0874312343ad029f37e63febdfa0b42e SHA-1: 7bdc410addfb6cc234b20ab208a2760662adfabd SHA-256: d8ee1c9a0f3f310734cec1377c721d8cf4d81bf2f44bbeb7a4aedc1571d7a993
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to a 'free album' and the malicious URL itself. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination. The primary malicious IOC is the ttraff.com redirector.

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=free++album+barasuara+pikiran+dan+perjalanan
    • http://kuvawi.buypanamacoffee.com/uploads/1/3/1/4/131438641/7225368.pdf
    • http://kopeta.rhythmandpurpose.com/uploads/1/3/1/6/131606597/bupubesogopusad.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/the_college_panda_sat_essay.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/bivawize.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0448/1450/0006/files/im_better_now_song_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/0745/8975/files/acidosis_metabolica_caso_clinico.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/pukesikifikol.pdf
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/73007143333.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/louvre_museum_self-_guided_tour.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/seloda.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/bobcat_763_service_manual_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_off00006036.bin
8598ae7f1b3e8ab8b32c35c559f733a42b72923beaf3f2da432e9178c92ec18b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6036 5340 bytes
font_01_sfnt_off00007243.bin
23d6adcfb141995e81ce7be858e3fd689a538b11715db5a2f8c42206d33b6f77
pdf-font-stream PDF embedded font (sfnt) at offset 0x7243 10524 bytes