Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdd35ed5833c305…

MALICIOUS

PDF

71.1 KB Created: 2020-08-31 21:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bce976ebbd4b05ac682df29e6b96019 SHA-1: 585f3d78d65d4acdb5d35518d3f0066281603973 SHA-256: ebdd35ed5833c305744ddedc6ac6ca429d34e11750c1a2d72db89de241a623a0
128 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it's a malicious redirector link, pointing to a URL that appears to be a lure for a 'weekly cash flow report template'. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a large number of embedded links, many of which point to benign Shopify URLs, suggesting a link farm for SEO poisoning or to obscure the malicious redirector. The primary malicious IOC is the ttraff.com URL, which is likely used to host or redirect to a malicious payload.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=weekly+cash+flow+report+template
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/simple_contract_agreement_between_two_parties.pdf
    • https://cdn.shopify.com/s/files/1/0437/5245/6346/files/acer_aspire_one_windows_7_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/18692690575.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/coffee_grinder_manual_or_electric.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/generic_abn_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/gekixekuwawebomorakalus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/zufotubiwux.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/quoth_the_server_404.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_606c7af355054e608dce279fc8a52927.pdf
    • https://static.usrfiles.com/ugd/95089d_13093396796f41e192626f2b7e118f12.pdf
    • https://static.usrfiles.com/ugd/3eed2b_a31c25a39b044926aa7d779b98889b3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_774efeb839ad48a9a590285939142e34.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1ecf845b4e84769b685920271feb4ac.pdf
    • https://static.usrfiles.com/ugd/e745be_a80cd068b6384190aa63126cbdbc123e.pdf
    • https://static.usrfiles.com/ugd/77941b_3be7dc6f0ac44b268c31c7de2f917f21.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_off0000da1a.bin
da1299f5d5fff07d9e66cd78b496639bdd5fad736c867a2a28da9a193914f9ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 5528 bytes
font_01_sfnt_off0000ece6.bin
32f95701721abbe10ef58975173cbd560c0d1935cb14549928d558ccb2fadcb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 10032 bytes