Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bac130c82e9b382…

MALICIOUS

PDF

43.9 KB Created: 2020-08-06 07:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 818a0f50a56e0f3534b5a46e81ec7b70 SHA-1: 5ad4fc6e306ba9d6d5c76a1d10dce06f61b5a849 SHA-256: 9bac130c82e9b382d0ddc2aa7c35da00e9d1d4fe53923d00526a048b589beeb6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to trick the user into visiting this malicious URL.

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=conductivity+meter+principle+pdf
    • http://files.anthonypiovesan.com/uploads/1/3/1/4/131437380/sulafokalojoni-julero.pdf
    • http://files.ctshakerfurniture.com/uploads/1/3/1/1/131164312/3297d418e398.pdf
    • http://files.bereanbiblechurchfm.com/uploads/1/3/1/4/131454503/9622768.pdf
    • http://monog.darlfinne.com.au/uploads/1/3/1/4/131438392/9479586.pdf
    • http://files.poppymiyongaphotography.com/uploads/1/3/0/8/130813489/5030007.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/zenakexuzugivadodatodanaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/58455284853.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/dumidagixuvadata.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/chemical_name_of_titin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/gowigevamur.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/28314381484.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/84955062046.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/myra_estrin_levine_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/31164371318.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/pasisipeniguxotideveb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/tapukinegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/34629126491.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_off00006d6d.bin
0d4394895a32cc362f9386f4c894fb74ea688641ad24c5ac8d9b12c95f3cf960
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 4980 bytes
font_01_sfnt_off00007e55.bin
ffba0e9e23aee19cf426bf766ab4e5fcb449134729a55ce1c9e9156b1c9dc0ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E55 10584 bytes