Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d41df3ba75ab73…

MALICIOUS

PDF

58.6 KB Created: 2020-08-17 17:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44bfda5ab9659f314f52994a6b7b4f5b SHA-1: 577e6b16306bf7bb11650b72c356f826ea007639 SHA-256: 99d41df3ba75ab7392502d3102ed32c3625f0102cc6dfc197ee1076e38362e21
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. This redirector is designed to lure users with the keyword 'apus launcher apk', suggesting a social engineering pretext. The PDF also exhibits characteristics of a link farm, distributing numerous external links, many of which are hosted on Shopify. The primary malicious link leads to 'ttraff.ru', a known malicious domain, likely serving as a gateway to further malicious content.

Heuristics 3

  • 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.
  • 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=apus+launcher+apk
    • http://files.thehuskyhowler.com/uploads/1/3/0/7/130775252/0bcfead14b4.pdf
    • http://dogawonut.vuongholdings.com/uploads/1/3/0/7/130738848/cd07a66a6541e6a.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/bigulefutovoguteribabile.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/trabajo_adiabatico.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/irctc_tatkal_reservation_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/36435086727.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/pinam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/john_deere_3010_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/english_amplification_writing.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/difference_between_adverse_selection_and_moral_hazard.pdf
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/faduxome.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/88958183343.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000b725.bin
45d2f0397cb3ecd86305168f98b4ff7e2b81df4465c8de1d61d70494754d662c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB725 17380 bytes
font_00_sfnt_off00005d94.bin
ecea2c7a2aba2e8dc08959a5de57812338e67fc6b8830b4219b26e0ea7750c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 5628 bytes
font_01_sfnt_off00007140.bin
89a96b9b155063e17e7c6ec108755da41737080bc81691a0f713d141b385fd55
pdf-font-stream PDF embedded font (sfnt) at offset 0x7140 5076 bytes
font_02_sfnt_off00008264.bin
593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 6640 bytes
font_03_sfnt_off00009402.bin
8ce77780f764a2d16e55e058179f35aabd7e8bbe0c05025483ad0eedb27ab5b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9402 10344 bytes
font_05_sfnt_off0000d115.bin
d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 2832 bytes