Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1f2e555cade0d9…

MALICIOUS

PDF

51.5 KB Created: 2020-08-07 01:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d02221e34252aaebe1f4470c0869f2 SHA-1: 503441c07de7bb9e873e7ef842e6501c2e495b89 SHA-256: 8f1f2e555cade0d958ac141bd2f512a9c281cd878c37ec5b50451bdd4adfa80a
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be a decoy, instructing the user to open a password-protected archive, which is a common tactic to bypass gateway security. The document body itself is heavily obfuscated but contains the malicious URL and other Shopify links.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=user+authentication+mechanisms+in+network+security+pdf
    • http://files.sadhanayama.com/uploads/1/3/1/0/131069869/zonovuwatufen-xinuvukezozib-buturozogupini-dotikimumare.pdf
    • http://files.cookingfunbyz.com/uploads/1/3/1/8/131857465/dosewavoniguje.pdf
    • http://files.forspaciousskies.net/uploads/1/3/0/9/130970012/3620446.pdf
    • http://files.pregnancyparentingboulder.com/uploads/1/3/1/0/131070230/6360972.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/jivudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/50029860069.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/jovafewemezoromati.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/6316767484.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/94494033306.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/jab_comics_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/xiwanubewelotexarigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/clinical_pharmacy_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7454/1981/files/46682794796.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/suxovugotax.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/67933711326.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/github_download_linux.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/jijivobefelebegageko.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/zolatolebowijugumirukag.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_off00008ae0.bin
c3faf4a2a918f021bdc117e05e0a68c5421ab97ec900edf9245e0b10d01f8499
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE0 5612 bytes
font_01_sfnt_off00009de7.bin
319291d611fb9cb05b02b96e556dab97a6a65316a33ff9cbc68f265d9b239270
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE7 10080 bytes