Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd120fa18159857…

MALICIOUS

PDF

46.9 KB Created: 2020-08-30 10:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4414f49682bb36fd31bc80bf0655f7ea SHA-1: 1c870db296b6fb1562e7689a2dacc4b2ccf579ce SHA-256: 1dd120fa181598577e3a003372fbac7928f9dff82912df0f9e58a476c04ea636
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=sigmakey+full+crack'. This URL is presented within the document body, alongside numerous other links to PDF files hosted on Shopify and static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure of downloading software. The overall pattern indicates a phishing attempt disguised as a software crack download.

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.com/wix?keyword=sigmakey+full+crack
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/air_force_y_group_old_paper.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/gigibejewusixuletupejin.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/nulameruso.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/90433448781.pdf
    • https://static.usrfiles.com/ugd/a467d2_fad1a262bcda420194349049e9e918ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_d35862a6fabe4deaa45b4555f8f02bd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97a4c2bb7ae48c3aba4fe4fdf46d109.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9e422887b9849548831af4a72104d98.pdf
    • https://static.usrfiles.com/ugd/b8c837_820a5227004c441c8dc8a2499c615489.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f5505025d5b4854ab95cd8b73e34d04.pdf
    • https://static.usrfiles.com/ugd/9ec29b_cbd8b703939e42afa14212ce0fc9faac.pdf
    • https://static.usrfiles.com/ugd/b47706_7de8f8afc1774664b2376051b142994d.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/58421588158.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/canguro_matematico_ejercicios_resueltos.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_off00007936.bin
4a80de1f3f3d40450ce263a1fd96c47a5a0d9f03c7abad87d0d4f06aa99b88e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7936 5292 bytes
font_01_sfnt_off00008b2d.bin
58bfe61e017415b254788d5b5007fb320ed8036cb90267e6a60b37bbbccb7731
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2D 10376 bytes