Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e274b319c6b5cc…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 12:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 800998e04bbf6315045fd8ebc26a7b67 SHA-1: db29048680df842fc012e6fcb65db95e4d83b51f SHA-256: b5e274b319c6b5cc7eecb84c354750dcec952ddf1f73cc8ca622ac0636ee5959
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=kdigo+guidelines+2018+anemia', which is flagged as malicious. This suggests the document's primary purpose is to redirect the user to a potentially harmful site, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of further execution chains.

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=kdigo+guidelines+2018+anemia
    • http://sanefis.kimberlifreilinger.com/uploads/1/3/1/4/131482975/1139622.pdf
    • http://files.dolphiness.net/uploads/1/3/0/7/130775402/litenaxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/pdf_antibiotics_classification.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/xefijuwinirumeregibaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/restaurant_inspections_forsyth_county_nc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/fabukediz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/paxowik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/95577326096.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/papixusisijipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/bootstrap_form_login_signup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/pidevexapede.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/google_sheets_onedit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/angelique_kidjo_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/pibasiri.pdf
    • https://cdn.shopify.com/s/files/1/0435/4493/6599/files/7609354151.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_off00005cdc.bin
24ac1fc9d4bb3b3d985923266fa8166044380ff3974965446a618d152a39ef47
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5340 bytes
font_01_sfnt_off00006eed.bin
4961e4788a71378f8367fe9c074231abbd906c5a3c74134a3751db33fe43e2a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EED 10404 bytes
font_02_sfnt_off0000925d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 4324 bytes