Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adb802d2cbe81ab…

MALICIOUS

PDF

38.7 KB Created: 2020-08-25 13:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b1b7cee213972b1f343fbf47792890a SHA-1: d943b3313a98dac7dd5ed251db33d45bd6d0fd64 SHA-256: 9adb802d2cbe81ab5dcfcf944875906ded5169443fa7a2712b81854f481847c8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and a redirector to known malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=slickgrid+cell+background+color+formatter. While many links point to benign Shopify domains, the presence of the redirector and the sheer volume of links suggest a malicious intent, likely for SEO abuse or to lure users to malicious content.

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.ru/pify?keyword=slickgrid+cell+background+color+formatter
    • http://fepemitop.tfgcco.com/uploads/1/3/2/7/132712354/nefive_gavomofivolirif_mifodovu.pdf
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/ligularia_reniformis_auckland.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/android_ordner_mit_pc_synchronisieren.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1557/files/32749965494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fasexerogetotano.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/biosafety_and_bioethics_in_biotechnology.pdf
    • https://cdn.shopify.com/s/files/1/0439/8910/6846/files/mexusuguzupabop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/25337320158.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0429/9368/0547/files/achilles_tendonitis_rehab_exercises.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_off000054a1.bin
6da11badd65f51fbd8d11005afd5fa3d71a7adecba40d49cf7c26e87e2dcab6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A1 5472 bytes
font_01_sfnt_off00006720.bin
813acf1b3f5bc02bd33bc0d40190438a2343eef444f4f1aa7f51ad60d0ad2873		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 11436 bytes

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