Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1855ee11597a12…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 20:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59b18a02f3097fbf14dfd9049a7755b1 SHA-1: 51c4f1218ec685a30d8f202232a3ace60b7643f9 SHA-256: 2d1855ee11597a122f64275129bc4a8d5bda48e6d01c648c559b1aa0762e61ce
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=adobe+air+installer++free'. This URL is presented as a download for 'Adobe air installer free', likely a lure to trick users into clicking. The document also contains a PDF link farm heuristic, with many links pointing to Shopify domains, one of which is also listed as a potential download. The presence of a visual download button heuristic further supports the lure-based attack pattern.

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=adobe+air+installer++free
    • http://files.centralpatux.com/uploads/1/3/0/7/130738559/purunavivaxu-tarifibifexo.pdf
    • http://munop.goffphoto.net/uploads/1/3/0/8/130874431/90216.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/halloween_color_by_number.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/black_and_decker_cordless_sheet_sander.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/nuzobisulejodesilafeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/36588475872.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/batekakot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0122/5114/files/1961778257.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/antenna_and_wave_propagation_by_kd_prasad.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/after_effects_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/simplifying_trig_identities_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/66766583627.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/tokyo_ghoul_minecraft_skin.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_off00006071.bin
496433f159e047fc85dc8fe843fc21eb255db9adfddd82680f6706ada3c4b65f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 4816 bytes
font_01_sfnt_off000070ce.bin
c2634bfc9a4f16e272ce1cbadebe67261479ae71e00612bb15a32318d87f96ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 10208 bytes
font_02_sfnt_off000093b3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x93B3 4324 bytes