Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ff8dad717365ad…

MALICIOUS

PDF

48.9 KB Created: 2020-08-24 11:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25c4fcfd7b568754027d353d3d8ae56 SHA-1: ea2ba52edfea665cd0f8b98926b4a81bcdeee449 SHA-256: f0ff8dad717365ad3e9557bed90642d39ebeb22b9e09b82bc052989c722638dc
154 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 'ttraff.com'. Additionally, it exhibits a PDF SEO link farm heuristic, indicating a large number of external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users through a seemingly innocuous document to a malicious redirector.

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.com/pify?keyword=ajax+tutorial+pdf+w3schools
    • http://xuled.comprehensivewellnesssolutions.com/uploads/1/3/1/4/131413418/rovivatipazi-botugisuda-pijuput-lipajojudowu.pdf
    • http://lorugefon.ligabytes.net/uploads/1/3/1/4/131408100/zewukesefepin-xetubimasawa-nibiki-semejiwalimud.pdf
    • http://files.costaricalakehouseforsale.com/uploads/1/3/0/9/130969659/kadesujeje_vitapuvivepe_komabokedu_bokijovebetix.pdf
    • https://cdn.shopify.com/s/files/1/0438/5472/5270/files/59402912700.pdf
    • https://cdn.shopify.com/s/files/1/0429/4380/7654/files/rajasthani_gana_bhajan_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4224/files/microsoft_wifi_direct_virtual_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/50677468364.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/nimususobejuxiniji.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/james_stewart_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/kifine.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/ssc_exam_mcq_answer_sheet_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/osaka_amazing_pass_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/reformation_heritage_kjv_study_bible.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_off00005d6f.bin
fb4ed3e130a81b6f9bf26861a8c714dc18203f843386513908b4040c46d94281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6F 5632 bytes
font_01_sfnt_off000070af.bin
61fbfa8fe066d6add4dbec42a1743ef30eedb909eb93f6daa911d1572362d9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 15648 bytes
font_02_sfnt_off0000a21a.bin
ceb30e69b2a1d6501fe8904d8a8466471eaa529f0958da5583c6585f97c9fab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA21A 16076 bytes

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