Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9203c8ef7dd8bd5…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 00:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94c180367cd9623c58643124f3ec87a2 SHA-1: 0ef1da1858f75fcd6f195248091afc759dae7665 SHA-256: d9203c8ef7dd8bd52fbde6de025d5382a8851662cc56259073571c6c8cfdb144
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=whatsapp+new+version+without+play+store', which is designed to lure users into downloading potentially malicious content. The document also features a mass external PDF link farm, with many links pointing to 'static.usrfiles.com', suggesting an attempt to manipulate search engine results or distribute content. The presence of a visual download button 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=whatsapp+new+version+without+play+store
    • https://static.usrfiles.com/ugd/b8c837_5e245d0cbf3d46e1b6d4f6411a156c38.pdf
    • https://static.usrfiles.com/ugd/704566_ac5bbd780bb84add9b09731dc6f4c391.pdf
    • https://static.usrfiles.com/ugd/89c6ad_fff931021e224ee096bd332184d26cf2.pdf
    • https://static.usrfiles.com/ugd/5a1791_be6e3f976b094897811499dfaf034897.pdf
    • https://static.usrfiles.com/ugd/ff2e72_b0820a408d584c8ba806b0988b868150.pdf
    • https://static.usrfiles.com/ugd/a640e9_552b566671614fc0aeaf4661489cfc0f.pdf
    • https://static.usrfiles.com/ugd/13ae68_ae83784968294835bd148c2fa768fa24.pdf
    • https://static.usrfiles.com/ugd/6812d7_fa4508e7cdd944428c81d018b7799d5b.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/gazajifonotozig.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/mutemipuxafafar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/marines_hymn_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/physx_loader_dll.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/advanced_trauma_life_support_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5104/1447/files/4705151987.pdf
    • https://cdn.shopify.com/s/files/1/0451/2271/5801/files/antibiotic_resistance_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6530/1400/files/convert_to_jpg_online_high_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/bonosu.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_off000067f9.bin
d578c8bb8f17b3f1341964720ffe9c9c425291ddfa86d36bca974008701b18c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F9 5172 bytes
font_01_sfnt_off000079a9.bin
fa1084e01a5cdbc1aee095b76ae4a65200480680cf56e3fcd1a35b05fbd29f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 10112 bytes