Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6ca271d897751b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 22:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff558ca0f83016f601ec017099d9e870 SHA-1: f10698468f6a6169e719542ba12d07ca930d82e3 SHA-256: 3c6ca271d897751b8352c4896ba74bef112bdab713381c0c6f227d757e1add0e
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One of the primary links, 'https://ttraff.ru/pify?keyword=weekly+workout+schedule+template+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and appears to be a lure for a workout schedule template, aiming to trick users into clicking the malicious link.

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=weekly+workout+schedule+template+pdf
    • http://vefelijo.archbaltapym.org/uploads/1/3/0/7/130775971/5690744.pdf
    • http://files.goldenplatinumtips.com/uploads/1/3/0/7/130776626/nuvisa-tebekiz.pdf
    • http://files.stanthonysschoolkitimat.com/uploads/1/3/0/7/130738568/lewuk.pdf
    • http://tixezu.kellymansfieldart.com/uploads/1/3/1/4/131407406/348448.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6299/files/22216762596.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/golagetenifimire.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/15090553650.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/rirodabobukeju.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/solucion_hipertonica_para_nebulizar_preparacion.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/learning_strategies_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/56842642576.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/49948541435.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/98051373939.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/silent_hill_shattered_memories_ps2.pdf
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/41542371673.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_off00005f71.bin
7d2c045fe5f5c8bfd6f9c132e9b4c269f762c4d23443f026ed90bcc5f3e6cf61
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 5396 bytes
font_01_sfnt_off000071f2.bin
95679cb4d24325efa59a8ecee8d9d67c65c062b6a50404db76f8ae5711ce2384
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 9920 bytes
font_02_sfnt_off000093ed.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x93ED 4324 bytes