Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ef4b591681dd03…

MALICIOUS

PDF

42.2 KB Created: 2020-09-04 06:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8876ceb1b4fa1988193db5e71d084950 SHA-1: 914136ef431bd4069fed9909c8f5569c05503f2e SHA-256: 57ef4b591681dd03208803e3c8d89a4e94ce8f628102a7a800beb91d95383c55
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This URL leads to a redirector that likely serves further malicious content. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious lure.

Heuristics 3

  • 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.
  • 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.club/wix?keyword=deadpool+2+wallpaper
    • https://cdn.shopify.com/s/files/1/0461/7486/3513/files/8715424340.pdf
    • https://cdn.shopify.com/s/files/1/0436/4242/1398/files/30149901286.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/69911471661.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/gafagivumaso.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/salanosokafiki.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/diwatinajevorukinifap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/5381274101.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/anomalias_eritrocitarios.pdf
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/segmentation_targeting_and_positioning_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1370/0764/files/29591784117.pdf
    • https://cdn.shopify.com/s/files/1/0448/4608/8349/files/calendrier_coupe_monde_rugby_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9100/9442/files/25324417300.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.pdf
    • https://cdn.shopify.com/s/files/1/0465/1479/8750/files/facebook_messenger_app_formatting.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/information_technology_project_management_marchewka.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_off00006774.bin
8c33594b0230381e7451276e948fb2e3cb52308f64e832ff1ad3e9c074dd7155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 4996 bytes
font_01_sfnt_off0000789a.bin
c5c377639c325726d668c7975ab39914ab714f4da623da41facace54ed191e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789A 10480 bytes

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