Malicious PDF — malware analysis report

Static analysis result for SHA-256 da13854ad609a7ef…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 05:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cada223038aa3a6f63bbc5230578ad56 SHA-1: f0f822d56620fd4c98f4d7a1aeabbf49581649b3 SHA-256: da13854ad609a7efad1f39a0a37dc7e323ea21f604066fedd933bb3fe9724ddc
152 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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=money+manager+badge+requirements+pdf', is designed to lure users into clicking it under the guise of relevant information. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=money+manager+badge+requirements+pdf
    • http://pekizozo.binhamvillagehall.co.uk/uploads/1/3/0/8/130813846/b9281e27.pdf
    • http://files.gwendolyndanielsmusic.com/uploads/1/3/1/4/131437413/6830415.pdf
    • http://files.inspiredbyyoujewelry.net/uploads/1/3/1/6/131637814/229a7.pdf
    • http://files.nysabaparent.org/uploads/1/3/1/4/131436956/1183530.pdf
    • http://files.theearlyeducator13.com/uploads/1/3/0/7/130775331/5085167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/kugopejigozaxepexonurapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/geothermal_power_plant_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9431/files/63931975065.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/cambridge_igcse_and_o_level_business_studies_revision_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6093/7382/files/liralanovumilugit.pdf
    • https://cdn.shopify.com/s/files/1/0437/8184/9245/files/nedijusuzaposutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/idle_air_control_valve.pdf
    • https://cdn.shopify.com/s/files/1/0447/5843/3943/files/lateral_epicondylitis_spanish.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_off00005d3e.bin
9e3a432d8239c667c6111321851bdb6eec5ca7b97f9e346b1fface1f75aa62a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3E 5700 bytes
font_01_sfnt_off0000708d.bin
8091b6b30cf4e393a15fe630ca0bd55f3fb3e06c785797526fc4a1fc6768bdca
pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 10180 bytes