Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7db58f1e88a080…

MALICIOUS

PDF

72.2 KB Created: 2020-08-02 12:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b651a0e91b996b592f577287c3d8d27 SHA-1: 3c275aece4bfcd66b808cfa17f937d86caf7efda SHA-256: 1f7db58f1e88a0807aabeecb971d5bfa94ad40ab1adeefd814d10a5962bdb20e
150 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 a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=git+move+commits+to+another+branch, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to redirect the user to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=git+move+commits+to+another+branch
    • http://files.catrinatenganartistry.com/uploads/1/3/0/7/130738696/cbbab214db61.pdf
    • http://files.starrpilatesla.com/uploads/1/3/0/9/130969265/wetekud_vazuteti_faderowagusiw_gumozogumuboxi.pdf
    • http://files.nickdellis.com/uploads/1/3/0/9/130969735/75d7eff862836be.pdf
    • http://files.sofiasrusticboutique.com/uploads/1/3/0/8/130814390/ramoxovifitipuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7175/files/40254302328.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/99417934875.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/metafedifogujixepawas.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/2009_volkswagen_cc_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/svg_to_linux.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/5760239614.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/the_fremennik_trials.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/bakisatotife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87074842841.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/gixivepoxedodaxiguwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/79382737316.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/zeveb.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_off0000d5c2.bin
28a41ed2afcc4c3ca00dc76d0c3c5de2ec832dc23dc81429d9e657815692e4f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C2 5240 bytes
font_01_sfnt_off0000e774.bin
0ae25b0ed39df9139e8071641eb2507ae3012066c9a9f66e1b05710d732c481c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 14028 bytes