Malicious PDF — malware analysis report

Static analysis result for SHA-256 a156d1f2778ac0b2…

MALICIOUS

PDF

38.4 KB Created: 2020-07-26 16:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2a3c838325c0f4056d0b7f50a2ccbf SHA-1: 519dc610a8bea2b8c903473b08047239040a730f SHA-256: a156d1f2778ac0b2e780e81447aa62000a0eef029ef9d26da02f73d1ad575f83
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is known malicious infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one leading to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text related to 'Calvin Klein women's performance shorts', suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting users 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=calvin+klein+women%2527+s+performance+shorts
    • http://files.leatherwise.co.nz/uploads/1/3/1/4/131413718/9fe8105.pdf
    • http://files.peterandannemariehelms.com/uploads/1/3/1/3/131383607/dorexodafo_paxofugipo_sikejorukolu.pdf
    • http://files.kazzrie.com/uploads/1/3/2/3/132303043/9288608.pdf
    • http://files.jennifertyao.com/uploads/1/3/0/7/130740589/savozijukuz_wopejuri.pdf
    • http://files.drmanuelamenendez.com/uploads/1/3/1/3/131380308/1036715.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/xapen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/90324873768.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/ditowus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/39635400848.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/73593952415.pdf
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/wewapewapol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/jodavevafanizuxami.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/redugakanirepax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/22887900645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.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/
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/ditowu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058be.bin
85f10efecfd2f31d159735eb312e95b1b170dc9cd80d9f28a29724548bda32f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 5316 bytes
font_01_sfnt_off00006abf.bin
fa184dbaaf26191a98ce6c202fcebf0a6f3dced79d7d2ff2955e724cd10c8bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 9480 bytes

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