Malicious PDF — malware analysis report

Static analysis result for SHA-256 430f7d5a541c4109…

MALICIOUS

PDF

40.0 KB Created: 2020-09-02 00:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdfda9b3123c98a34378d6a9e0c28bd0 SHA-1: 0584bddc321660f9e49b3479380d64447f2e0983 SHA-256: 430f7d5a541c410942279abf681203271b59016f8fe715d93723da6da12db158
152 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, appears to contain the same URL and references a topic related to CVs and resumes, likely as a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious URL.

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/wix?keyword=difference+between+cv+and+resume+template
    • https://static.usrfiles.com/ugd/b8c837_07d49d4fb06744a1883f067bfe3d891b.pdf
    • https://static.usrfiles.com/ugd/de3d83_ce2beebb0ec3413c8a705166c8300970.pdf
    • https://static.usrfiles.com/ugd/c5d40f_d7e103b910f44d45aac38a4120b1822a.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_72822c14d89d4573bd4ead9475e18d5f.pdf
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/80153739222.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/sogaraguzabuvim.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/59449581960.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/alternator_working_principle_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/govejowexiwefexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/network_topology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/55616381637.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/ardhanareeswara_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/68500276200.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_off00005eb3.bin
03f95ab69025654e68ea5a12792cce13e74c27ae9c43291667bc35fdea7f1fb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 5592 bytes
font_01_sfnt_off000071bc.bin
e6d9860b346e6c6aba76abd4f54b985f61a96670df484502df3a456934879cea
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BC 9856 bytes