Malicious PDF — malware analysis report

Static analysis result for SHA-256 35174dd3803d9911…

MALICIOUS

PDF

42.1 KB Created: 2020-08-20 08:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70827538f9d4af860e987d3111b81d7e SHA-1: 5cb389dcfdc1080c40a4a5e041c58a8c87544865 SHA-256: 35174dd3803d99117a6a870070c35fd51284e46f1385c4baa726c8aaaebadb05
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body also contains this URL, presented as a lure for downloading a 'Chrome browser apk'. This suggests a phishing or social engineering attack aiming to trick users into visiting malicious sites. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results, potentially to host or distribute further malicious content.

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/pify?keyword=chrome+browser+apk+apkpure
    • http://jisatul.diaryofaspectator.com/uploads/1/3/2/7/132740541/kenonusogoru.pdf
    • http://jasotewe.cherylreed.net/uploads/1/3/1/0/131070109/dofiwaw_mokanelebegul_xutovoparam_kelinakujoge.pdf
    • http://files.cottontailcottage.org/uploads/1/3/1/4/131408970/xutaxegowaki.pdf
    • https://cdn.shopify.com/s/files/1/0448/4261/4945/files/altered_traits_summary.pdf
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/hot_college_football_sideline_reporters.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/farubuvaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/bojudu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/48552594435.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kujefitil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/45083924395.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/guziburuvepog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/fepafenupeveti.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/bayan_tariq_jameel.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/faponax.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/carb_cycling_meal_plan_male.pdf
    • https://cdn.shopify.com/s/files/1/0460/3923/6767/files/arya_malayalam_movie_ringtones_free.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_off00004b02.bin
252f4546c995ebad7234924aaed9161fbcf4c22cbc847b1a627e97da0aca6035
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B02 5228 bytes
font_01_sfnt_off00005cb5.bin
16ec9fee72be0cdcd2b2c9782832e655724ec9644137d76ae68bc88d6c640cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 12748 bytes
font_02_sfnt_off000084b8.bin
c07d4d907addb1d04afd140710fa8e6eaf971d194cab70880e2a017b9afd7240
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B8 16428 bytes