Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a97d2a535af61c8…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 15:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91326605c2dcb68bf7258e78f4d65d46 SHA-1: 86837f62a3a7de106b36835e3ec0b62938b2ef81 SHA-256: 2a97d2a535af61c846f6fcb34f97974a05f28d97d45c67717f6b2bb5b01ae0c9
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure. The document body text, though partially corrupted, includes the phrase "Kenexa powerpoint 2013 test answers", suggesting a lure to trick the user into clicking the malicious link. The PDF also contains a large number of external links, many pointing to Shopify domains, which is characteristic of a link farm used to distribute malicious 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=kenexa+powerpoint+2013+test+answers
    • http://vitatele.cloudhauz.com/uploads/1/3/0/7/130739430/6220830.pdf
    • http://files.danceconnectionpac.com/uploads/1/3/1/4/131453260/1877503.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/sojuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/9911/7986/files/3692002787.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/magemireduvepe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/xepasovezopujobod.pdf
    • https://cdn.shopify.com/s/files/1/0453/3475/7531/files/types_of_nouns_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/75445040653.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5788/files/39876228556.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/92957142512.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/wowekozuwolabaxipit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/leres.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/52612486141.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/bernoulli_equation_proof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/adelante_dos.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_off00005e40.bin
ad54dcb7951fd9760c3f83f3fc0564a13d199e4249606cd18374fe9914b55c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E40 5400 bytes
font_01_sfnt_off000070c9.bin
fb7bc3f20017611b25199bd8c511f559016a9b51a70352bf647d7a055b8df615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C9 12596 bytes

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