Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ed7bb9656b79ca…

MALICIOUS

PDF

49.5 KB Created: 2020-08-29 17:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e7cc9063acd54751bd90348702fabfa SHA-1: 94dcfe4d8c4f24ebce092e719e0874f250a295d7 SHA-256: 88ed7bb9656b79cac33a1411a6135cea5509732b45a8671296a98155642e24cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of links, as noted by 'PDF_SEO_LINK_FARM', suggests a tactic to obscure the malicious intent or to distribute various payloads.

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/wix?keyword=pilgrim%2527s+paradise+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/analytic_philosophy_of_religion.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/silegifenopulewubofevub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/mlp_queen_chrysalis_reformed_fanfic.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/wasabi_sushi_and_bento_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/2242/6013/files/backflip_madness_apk_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/28244038290.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/pivegevitusedejikupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/ruxazutavavojakizapite.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/probiotic_and_prebiotic_foods_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/77337429965.pdf
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/jimupisemagu.pdf
    • https://static.usrfiles.com/ugd/824332_bced4f6d74f64f6c96005de58b4d78dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d49e5c5caf9482085299ed73482cb7e.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_a871c27680bc430c89bdc8ad5f72a18b.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007689.bin
4d007ce99ca86fd95742df9d3ec74d4fe60fc0c1a36d24d975ee5661a9f1c3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7689 5364 bytes
font_01_sfnt_off000088a7.bin
24f032a3ae0891c7eb36d646e73812ae266573866e4bd5a318dcea0ba0247f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 2320 bytes
font_02_sfnt_off00009316.bin
bda13ce00efd88588778bcb7d36255934bfbbef86fb21ba9f3281176ccdd15fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9316 11176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.