Malicious PDF — malware analysis report

Static analysis result for SHA-256 af84c52b63eec2d4…

MALICIOUS

PDF

34.5 KB Created: 2020-08-24 16:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c22c316712f6a078af4b1fa490ffa5 SHA-1: a06a4349a017c6e00e65906a57ae9f56ee22dd1a SHA-256: af84c52b63eec2d4271dd4b675b2befd3b19ee07c87c09fe82b2621079f629f4
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One URL, https://ttraff.ru/pify?keyword=bangor+weather+report+maine, is flagged as a known malicious redirector. The document body contains garbled text but also includes the same redirector URL and several links to PDFs hosted on Shopify and other domains. The presence of a malicious redirector and a large number of external links suggests an attempt to lure users to malicious content or manipulate search engine results.

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=bangor+weather+report+maine
    • http://nazej.patricialangevin.com/uploads/1/3/1/4/131408008/velamafibi.pdf
    • http://kefodume.batesrobplayers.com/uploads/1/3/1/4/131453630/6323947.pdf
    • http://nofuv.astrogloves.net/uploads/1/3/1/4/131452988/fanuvineru.pdf
    • http://sorejow.dannguyenportfolio.com/uploads/1/3/1/3/131381720/zademajelajek.pdf
    • http://files.mrcanale.com/uploads/1/3/0/9/130969474/xakoni-tubuje-galelenijuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/61974619080.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/best_body_transformation_gym_london.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/dowukej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/administracion_de_recursos_humanos_mondy.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/biwokugixanofuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/46244372869.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/neluxukan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/kuxovotisujotuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/22490670252.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_off00004a7f.bin
47c0f4ac37defd2da487bc510e37c0ecfaf124d7df6cfcfa34e8623915228877
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7F 5164 bytes
font_01_sfnt_off00005bf4.bin
8431ad04b8730c6c33a8be724f32ab262e68fae43cd626958913467bac7b70dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF4 9784 bytes