Malicious PDF — malware analysis report

Static analysis result for SHA-256 596a6339286a7f2a…

MALICIOUS

PDF

48.7 KB Created: 2020-08-24 09:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a13520bb0c51ee989d7495e65fe7583 SHA-1: 62da2b5da321f080616106ce7c7c07c14d32c808 SHA-256: 596a6339286a7f2a55350911ee21ab78eed160c7232d72cc5f4804a8103d1d4d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits a PDF link farm, with many links hosted on Shopify, but the primary malicious link is the redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a 'flow wrapping machine manual'. The presence of a remote-support tool lure suggests a potential pretext for gaining unauthorized access. The primary malicious IOC is the redirector URL.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=flow+wrapping+machine+manual
    • http://files.capewaycleaning.com/uploads/1/3/0/8/130874097/mijuwafojopim.pdf
    • http://files.naminggraceinthedomesticchurch.com/uploads/1/3/1/6/131606275/32da4ef.pdf
    • http://lufemo.rebeccahornbeam.com/uploads/1/3/1/3/131378970/tozaxobozabe-rikugakom.pdf
    • http://files.superiorusa.com/uploads/1/3/1/8/131872298/6414484.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/bseb_10th_result_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/maxavapijinivevanotewudir.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/yeti_bike_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/tutugajip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/make_your_own_report_cards.pdf
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/auto_tune_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/86251668213.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/koruxakanob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/revekililonalerovezotojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/zekopuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/13971610894.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_off000079b6.bin
79771692b16308bbc433b03fbc3b27280d0bcb9168c48cde2c9c177b4f65f33f
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B6 5216 bytes
font_01_sfnt_off00008b58.bin
fbadb1206e3022d2bcb7c7bb93d5257edb0c9224d3bf7430e05d600781c821cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B58 13736 bytes