Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f7b9e71d1596cb…

MALICIOUS

PDF

111.0 KB Created: 2020-08-25 03:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3408f48899fb20d6f200fd0d9847a19c SHA-1: bb934ba5da647bf38d65d4534859e899a7bf2cf6 SHA-256: c4f7b9e71d1596cb11122061f8435f4748c6835398dc2de441517ce5a0606480
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=a+k+47+gun+full+form'. Additionally, it exhibits a link farm behavior with numerous external PDF links, including one hosted on cdn.shopify.com. The document also contains a lure for remote support tools, suggesting a social engineering pretext. The combination of these factors indicates a malicious document designed to redirect users to harmful content.

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.com/pify?keyword=a+k+47+gun+full+form
    • http://files.heberwildhorses.com/uploads/1/3/1/8/131871518/mivulexomex.pdf
    • http://files.stannshohola.org/uploads/1/3/2/6/132695832/jenimepodemiseveranu.pdf
    • http://files.chloedaniellewhite.com/uploads/1/3/0/8/130814902/6760256.pdf
    • http://files.durgansc.com/uploads/1/3/1/8/131871587/325cab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3526/2104/files/65217965096.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/xomamelafisepuwonejub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/22763463149.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/fuwupupowuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/tovipen.pdf
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/kofufozeganisuxoxupifuno.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/34582413912.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/jimixuxasez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/small_smiley_face.pdf
    • https://cdn.shopify.com/s/files/1/0463/2998/7234/files/free_tv_series_and_movies_sites.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/biodata_format_for_marriage_for_hindu_boy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158f9.bin
be30c774e0b4585016ea2c200353930f4e9398ff52b3fdc796101f123eb01364
pdf-font-stream PDF embedded font (sfnt) at offset 0x158F9 4920 bytes
font_01_sfnt_off000169b8.bin
d26d1939aab15dc1786fec19f3bb5d846e3b0b8c9913b7f176cbc91cf8c43fa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x169B8 15484 bytes
font_02_sfnt_off000199fa.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74
pdf-font-stream PDF embedded font (sfnt) at offset 0x199FA 16060 bytes