Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ade8e52109cba5…

MALICIOUS

PDF

40.1 KB Created: 2020-08-16 22:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 864534d548aafad13672b9db858b69c7 SHA-1: 7b81bf421e27964136158d2ff4f1558ec86c95e9 SHA-256: 39ade8e52109cba5298cdde6ac7fd8ae23773c9d14f64e3d4cac9a5f15e263d5
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of embedded external links, characteristic of a link farm, with the primary malicious URL being https://ttraff.cc/pify?keyword=barf+si+lyrics. While many linked Shopify URLs are confirmed benign, the presence of the redirector and the sheer volume of links suggest a malicious intent to distribute spam or 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.cc/pify?keyword=barf+si+lyrics
    • http://files.mgtowtv.com/uploads/1/3/2/7/132740275/rasemijinutag.pdf
    • http://lebokoxu.olympiamarines.org/uploads/1/3/1/4/131453206/xobani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/the_ascended_masters_light_the_way.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/virepiduvone.pdf
    • https://cdn.shopify.com/s/files/1/0436/9838/9145/files/pavaziwiranurorakinukive.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/63632655467.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/bunulazimurawij.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/1269981243.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/vajenoziwelifibebivodid.pdf
    • https://cdn.shopify.com/s/files/1/0433/7831/1318/files/barricades_mysterieuses_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/clustering_algorithms_in_information_retrieval.pdf
    • https://cdn.shopify.com/s/files/1/0447/6112/0919/files/what_is_binwalk.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/fivaxefakiruretit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/95035420881.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_off000053db.bin
cefceb13b9282bdb9acac6bb85ae26069bf87a148db977d40fe1f925610f1d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53DB 5024 bytes
font_01_sfnt_off000064ff.bin
23c6576143da160a2737f46a191f4133ec1c2e9858e915819f8008baa75820c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 14440 bytes

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