Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadc5e5c43f9e414…

MALICIOUS

PDF

45.2 KB Created: 2020-08-18 12:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4cdbd24df1e013eaeffc6027436a98e SHA-1: 29a13c8477b9555f053f1d129270891e35dd156b SHA-256: cadc5e5c43f9e4142dc743b5f1b2824afd1baaedaea5731abd7f75974c432c4e
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=videoder+pro+apk+14.+4'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent. The document body contains garbled text but also includes the suspicious URL, suggesting it's part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=videoder+pro+apk+14.+4
    • http://files.westclermontlutheranchurch.com/uploads/1/3/1/0/131070646/folerovizox-tekifubud-mixogapipes-rigukixazaf.pdf
    • http://files.hillszonechssa.asn.au/uploads/1/3/1/4/131438761/5814c2af909.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0241/files/anselm_grun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/fatal_no_such_remote_origin.pdf
    • https://cdn.shopify.com/s/files/1/0438/0760/4896/files/7095816170.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/discord_restrict_bot_to_channel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5505/3989/files/business_law_today_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/sekiro_offering_box.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/gsxr_750_horsepower.pdf
    • https://cdn.shopify.com/s/files/1/0431/8593/0402/files/nibalas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/1310914361.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/cch_chuyn_i_t_file_sang_nh.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/adobe_photoshop_cc_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/6612/2662/files/88611346728.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/85082039695.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_off000068b8.bin
9554632a97839cf655b6148be29cf0612527241290b744fe1eb899a337ce20db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B8 4944 bytes
font_01_sfnt_off000079a2.bin
98de79b297e3797e740cfbde3538a37bcda84e2cac2672723d669a8421f405b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 2012 bytes
font_02_sfnt_off000082d9.bin
e55ada5c9a50af763c1a309d808b387d2256ed329d66d828f4f9f91041b2ee58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D9 11372 bytes

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