Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81cbd8a00594695…

MALICIOUS

PDF

64.0 KB Created: 2020-07-31 14:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d04f0f602043b7aeb69211586768ff2 SHA-1: 0b0c7a8e8f89c6166e5de0b6d462c0ef27b5e40f SHA-256: d81cbd8a00594695d3717149cb7d026fc0f1f7510d59b3f164ce70600be7586f
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, identified by the PDF_SEO_LINK_FARM heuristic, designed to direct users to external websites. One of these links, ttraff.ru, is flagged as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'epidemiology of ascariasis pdf', likely to trick users into clicking the malicious links.

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=epidemiology+of+ascariasis+pdf
    • http://files.equestrianeliteatapplejackfarm.com/uploads/1/3/0/7/130776433/folebusunaruwux.pdf
    • http://files.lgcryogenics.com/uploads/1/3/0/9/130969904/8c6092b.pdf
    • http://files.krista-israel.com/uploads/1/3/0/9/130969791/sapibekufasufop_zabugotumo.pdf
    • http://files.uciphideltaepsilon.org/uploads/1/3/1/4/131437873/soxomumowopu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/lefefitoxuxexagabumex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5558/files/37519056897.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/94966212926.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/42301097939.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/29060049742.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/34659740471.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/fixuzaweruratiduze.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/dijagozasuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/68183904137.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/64242606305.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/jibanisevide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/roxasake.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/45160840161.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_off0000be4b.bin
470519d54e310d401f07f8150114bcc44b06edf1e7ae44bf1a32cb21d8f77be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 5136 bytes
font_01_sfnt_off0000cfcf.bin
78eab232d10ff04c6a8f75d2fd256f20fe88457bac5bb29b5bd6e9b3a1dc5718		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCF 10208 bytes

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