Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b2fec1d20f5f35…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 22:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62ce1b2b7692d21845247b0632054472 SHA-1: efd1daf71a33eaedca33eb83d82409879968919c SHA-256: b1b2fec1d20f5f35c81265a35b13843fb20b0af922c91c1d7027cdff3fe1647e
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to external resources, a technique often used for SEO poisoning or link farms. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. The primary attack vector appears to be tricking users into clicking these links, leading them to malicious sites.

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.cc/pify?keyword=piezoelectric+actuators+and+ultrasonic+motors+pdf
    • http://files.hulowmedical.com/uploads/1/3/0/7/130776646/pularupavojab.pdf
    • http://files.winema.org/uploads/1/3/2/7/132712333/c96808daaf85.pdf
    • http://files.singwithbscs.org.uk/uploads/1/3/1/3/131383294/10206dcea3c48.pdf
    • http://files.potterplacefarm.com/uploads/1/3/0/7/130775431/1009491.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/wobuleg.pdf
    • https://cdn.shopify.com/s/files/1/0435/1361/0392/files/zetotalefejanonevenixad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/gusinufojibuxuvosuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/jukebox_minecraft_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/xefuxafazij.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/giloxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/fadululixevofofono.pdf
    • https://cdn.shopify.com/s/files/1/0429/6130/5756/files/92459363350.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1280/files/43944709857.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_off00006943.bin
473fc2a5c62125cdd5a1ece434706aec483098138a86d65a0f64e63d2d606ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 5352 bytes
font_01_sfnt_off00007b69.bin
cb000bf2f87db6ebebe011b50c3783e74a0bd067276b58d89e49e261fd84d3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B69 10108 bytes

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