Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d147a3ed6f7796e…

MALICIOUS

PDF

68.7 KB Created: 2020-08-30 22:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40cbcb1cab56c48782ede0fb04277e2 SHA-1: 7278be2240c84c6e9c36937549277e6e7abb3e10 SHA-256: 6d147a3ed6f7796e2606f08941bd1c378fdab5827f14daebe92d7120c5e51835
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL for the malicious redirector, indicating an attempt to direct users to malicious 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/wix?keyword=roque+sete+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/valutigozabojenaxutimujit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30611133668.pdf
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/zowonitikasekaleribajeni.pdf
    • https://static.usrfiles.com/ugd/ab059d_c5de20eb0b2a46eba0bd721177ed5496.pdf
    • https://static.usrfiles.com/ugd/ac72e0_91ff23283ec84f6facef8cba784980e6.pdf
    • https://static.usrfiles.com/ugd/dcfb95_fb0874732c4242009ab45a638e67b3c0.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_d3a78fbc102044dd9ed9d4f3debecfb7.pdf
    • https://static.usrfiles.com/ugd/865d50_65d7b5e82e0540e99721aed59daabead.pdf
    • https://static.usrfiles.com/ugd/99afdc_12c45caf0a5f41188af5d035413bcaa3.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/java_sort_map_by_value.pdf
    • https://cdn.shopify.com/s/files/1/0458/0799/2998/files/wifudaremidelujebakemovax.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b366.bin
b9c91b5193229e06972e7dcd760d02ead7524bd94c8a3a2e98652b44afa9c2df
pdf-font-stream PDF embedded font (sfnt) at offset 0xB366 4652 bytes
font_01_sfnt_off0000c34d.bin
c2383fc16fcf31a533e79a04a62f9bbf1a28b0ad03750dac764d23278b9d34b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC34D 16460 bytes
font_02_sfnt_off0000f62a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 4324 bytes