Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b3cf7fd130f09f…

MALICIOUS

PDF

39.1 KB Created: 2020-08-20 11:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 122df6047bf89f14a46523fd04821ffc SHA-1: ee07ee7dff0c533b814c52f51faee6681ca8ee2b SHA-256: a7b3cf7fd130f09f84c331c3f98f55d72d7d09b39d69a33066845f0b12fd5874
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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=challa+song+babbu+maan++mr+jatt
    • http://xodoto.worldvegantravel.com/uploads/1/3/0/7/130739777/f6de01704f3635.pdf
    • http://nededugo.crusadecavalryreenactment.com/uploads/1/3/1/4/131452903/gakazegexolazid.pdf
    • http://files.draumalandslabs.com/uploads/1/3/1/6/131606482/8069493.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/43649556794.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/lojonog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/analgesico_para_gatos.pdf
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/7056586965.pdf
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/puxazedufipoxububu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/mudorosusureritatawuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8679/7213/files/bawega.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/blue_mountain_village_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/voxenumor.pdf
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/merosezipemizoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/68138831884.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_off0000518c.bin
b0f3e451cc08231e7c292b18d138391044c1595fa0a0e2e7774b506c9a01bdd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x518C 5220 bytes
font_01_sfnt_off0000631f.bin
a4a8c24b7f19ebfcedc2a921f7b7a821ccc28921fbde3735e1f86c9f54a70152
pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 14188 bytes