Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea7320c8167405f…

MALICIOUS

PDF

38.9 KB Created: 2020-08-20 04:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae31e8e548f3bc2cd1090f342ba8b27 SHA-1: 1ef5ddaa03546701fcc20fa9f3948434ffbba3bb SHA-256: fea7320c8167405f1781f9711e4320c54b19bc4782221903ed047c851b0849e6
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=lifters+guide+to+elbow+pain', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to 'Lifters guide to elbow pain' and mentions 'wkhtmltopdf', suggesting a lure document. The presence of a malicious redirector and a link farm indicates an attempt to lead users to harmful content.

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=lifters+guide+to+elbow+pain
    • http://tutuw.cindyannebroz.com/uploads/1/3/1/6/131636725/tulebexo_koliwox.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/72896995378.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/adoracion_al_santisimo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/hackers_toefl_actual_test_reading.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/xijosixuwizivotasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/nexanotadiburo.pdf
    • https://cdn.shopify.com/s/files/1/0460/7783/7476/files/favelle_favco_berhad_annual_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0451/6826/3317/files/prefix_and_suffix_in_english.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_off00005ae5.bin
b389b98161beab4e284b3e1d073798a3176a128381812415f62199988016870d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE5 5384 bytes
font_01_sfnt_off00006d4f.bin
deedfb980cd89543fabaa45c9bb87126108d851f185fc0157a5868e2475264fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 9960 bytes

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