Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f92ed1ee2e6be6…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 18:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3a066f02d63c98a6eacdd029b2c434 SHA-1: ab803c79cb3edb2329fd2026c275ea0085870ff0 SHA-256: f5f92ed1ee2e6be6e4f33a14ccb309e4134846953dbab37911e3ae47bec51f40
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. One of these URLs, 'https://ttraff.com/pify?keyword=noun+adjective+verb+word+formation', is identified as a malicious redirector. The presence of a malicious redirector and the sheer volume of external links suggest an attempt to manipulate search engine rankings or to distribute further malicious content, potentially leading to phishing or malware downloads.

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.com/pify?keyword=noun+adjective+verb+word+formation
    • http://files.shcdc.net/uploads/1/3/2/6/132680813/9d0405900257.pdf
    • http://files.castillejacotton.net/uploads/1/3/0/8/130815137/e074761e.pdf
    • http://zuzagora.johnromeromusic.com/uploads/1/3/1/3/131383483/536509.pdf
    • http://wuroxi.caddenggroup.com/uploads/1/3/0/7/130739430/9593404.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/lerojoviduwapebuguze.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/30300292877.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/tarovibawelelojakawinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0440/5038/2998/files/35661420150.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/rataj.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/73862144102.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/sasizakenave.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/tomex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/44915423589.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/86432344039.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/34596239505.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_off0000630c.bin
838d1624f3aaa6cc12c848a159b67fb7e6bf2cd069af6f91acb34912da9bdc3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 5176 bytes
font_01_sfnt_off000074ae.bin
dc20d5e401904388fd1ce35c8f62ddeda8775eda914f1d15bb273a784aeb3361
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 14732 bytes
font_02_sfnt_off0000a1d4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D4 4324 bytes