Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f03d53305fc543…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 01:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ada0f19150dd333e7c2acb689c4e997d SHA-1: 78e4e41b2249fbd552f8f0be955ad9f18add516b SHA-256: 89f03d53305fc54356895add8d988542cff06642eca9624978d98fc8edc07391
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This URL is likely used to funnel victims to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, suggesting an attempt to obscure the final malicious destination. The document body, though partially corrupted, contains text related to file conversion and includes the malicious URL, reinforcing the lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=c%25C3%25A1ch+chuy%25E1%25BB%2583n+file+pdf+th%25C3%25A0nh+file+h%25C3%25ACnh+%25E1%25BA%25A3nh
    • http://files.fuelyourvibe.com/uploads/1/3/1/3/131380292/9772970.pdf
    • http://files.fhotosnearandfar.com/uploads/1/3/1/3/131383333/7432938.pdf
    • http://tuvum.bj-woodworks.com/uploads/1/3/1/4/131438477/fogoki-pesur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/rarobekokisewidomat.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/38076434449.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/student_biodata_format_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/pusufujopelunowiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/71111921821.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/unstable_angina_classification.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/89358178442.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/bransden_joachain_physics_of_atoms_and_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8053/files/webariletekeguroweropulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8359/files/jamaloremisuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/nasazibawivug.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_off000058ea.bin
56f4e7eb10fe6b9262bcb59b1d1f79546e98ecc75b4fb805b37aa29807c8b9e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 5652 bytes
font_01_sfnt_off00006ab1.bin
021e60f88c4013f4300442984d1469694c93d90b12e60bb73dc9b99b5db8083d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 11020 bytes
font_02_sfnt_off00008e52.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E52 4324 bytes

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