Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5959ce7ca85e4a4…

MALICIOUS

PDF

43.3 KB Created: 2020-09-10 04:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33f3128457a4000ddd40e5a2061a7f40 SHA-1: bede6e441533d117a8142f3a31def3bc5c8045cc SHA-256: c5959ce7ca85e4a477a497a5019e48a34043126470cfa1a41b6efba9b941da5a
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations by overwhelming users with choices that ultimately lead to harmful sites.

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.me/wix?keyword=lamparas+con+paneles+solares+pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/38054259699.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/43874772258.pdf
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/chicken_noodle_soup_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/the_assassination_of_jesse_james_screenplay.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/3088235636.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/suxalebotavixiperuros.pdf
    • https://cdn.shopify.com/s/files/1/0459/9473/7821/files/chaotic_sword_god_novela.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/wujovewemivixiris.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/rajikiwupamufudeletujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/air_breathing_engine.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/xubugunanukopuwewuzivaje.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_off00006886.bin
e2337ac0c70a698f5801a514c34cf2a656f5ee86110cfcc1e11f3a4ef33c2aad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6886 5240 bytes
font_01_sfnt_off00007a44.bin
d29791dd52edbda8bb0856527a2474ca3d10b00371788d166d1db7fd9b4ba473
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 11416 bytes