Malicious PDF — malware analysis report

Static analysis result for SHA-256 db258835131078e3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 18:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58b4e8d4b526f95c5190f4528e8b1075 SHA-1: a08adb09b1f1b37a2fd0da26887f8ae6ce1438ab SHA-256: db258835131078e370a8d878908cba287e839e477b881cce50674433c1d02ae3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to disguise malicious redirection. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the intent to redirect the user. No scripts were extracted, limiting the analysis of further payload delivery.

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=switching+and+finite+automata+theory+kohavi+pdf
    • http://rudaras.barbizonstl.com/uploads/1/3/0/7/130738970/libelini-kaboxerira-bekeka.pdf
    • http://files.myelegantweddinghk.com/uploads/1/3/2/8/132814742/c5435be.pdf
    • http://files.accidental-blogger.com/uploads/1/3/0/7/130739814/7833137.pdf
    • http://files.biomedicalequipmentplanner.com/uploads/1/3/0/9/130968943/1640062.pdf
    • https://cdn.shopify.com/s/files/1/0432/4789/4683/files/19752617700.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/minecraft_server_icons_64x64.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/zegobebogog.pdf
    • https://cdn.shopify.com/s/files/1/0448/1286/1600/files/9692589188.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7599/files/84558230263.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/63648004960.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/41239071812.pdf
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/88480016228.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/parowokumebewugune.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/begajugopebu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/53103936369.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/wasikamijinogisig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/curvilinear_coordinate_system.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000546a.bin
2a801371c55a93713fd13dedc2641873b218286003953c0a103b492a8a234cd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x546A 5664 bytes
font_01_sfnt_off00006795.bin
29a5984b053ea398e383f72b91df4fa1714c7913b7b45cff816262056124535e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 9752 bytes
font_02_sfnt_off000088d8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x88D8 4324 bytes