Malicious PDF — malware analysis report

Static analysis result for SHA-256 78300d01c2f6250e…

MALICIOUS

PDF

33.5 KB Created: 2020-08-16 23:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0242035084a775c6eea2d08ff63e4162 SHA-1: 0ce1b572f70e03942afeb60853ae5543cd8af776 SHA-256: 78300d01c2f6250ef965df21bd88c4ec413b0036b18f550aa67840d9a3593794
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with 28 external links, including a redirector to malicious infrastructure at `https://ttraff.ru/pify?keyword=thaumcraft+6+guide`. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=thaumcraft+6+guide
    • http://dewif.vanbrouck.com/uploads/1/3/2/7/132740720/1677679c.pdf
    • http://files.mdeyedocs.com/uploads/1/3/2/6/132683063/f8206cab4c4c9b1.pdf
    • http://files.rayzimmermanauthor.com/uploads/1/3/1/3/131382673/1303474.pdf
    • http://vexujopar.silkysbrooklyn.com/uploads/1/3/1/3/131378950/sulume-garij-fubejipixelojal.pdf
    • http://files.mysaintbarx.com/uploads/1/3/1/4/131406827/suzumik-nekipokijev-sekaz-tefekikas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/99482060360.pdf
    • https://cdn.shopify.com/s/files/1/0441/1867/1512/files/brokenness_aside.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/59905100321.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/27163285298.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/72501047235.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/ludora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0440/4445/1990/files/integrated_cost_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/carbon_dating_examples.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000469c.bin
169951ad3077bc5ec86daf74cffbee0154cc68262a8d38d87227d1fde25d1960
pdf-font-stream PDF embedded font (sfnt) at offset 0x469C 5328 bytes
font_01_sfnt_off00005894.bin
aa74e74db405eabd4c3f7135d3df5ecfcb9ae4033d91eee0b578cb5627502956
pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 9600 bytes