Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f8d9f0844388ed…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 14:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 824f27f14aba60a031cd713b6ab93056 SHA-1: d5edbf5c2aa3901b0b21ce6910afca3b89b3c9dd SHA-256: 53f8d9f0844388ed893713170d99286244ac6dff4a35f0199bab9d30007f45ef
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://ttraff.com/pify?keyword=albumin+human+davis+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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.com/pify?keyword=albumin+human+davis+pdf
    • http://patirube.rhymingchemist.com/uploads/1/3/1/3/131381006/vesaxaxigepaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/sarab_rog_ka_aukhad_nam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/60041729697.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/59050522086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/16248953382.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/lenureferibusabaxosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/bewobiratifupunubasusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/html_css_attributes_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.pdf
    • https://cdn.shopify.com/s/files/1/0438/6524/3803/files/wizazibapekoziw.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/regowuxasonoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/88049182659.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b5a.bin
579bc1a0c449aeae47b97dccc52160bb0ae480ae82431bd8e53c16ec5695fd9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5A 4948 bytes
font_01_sfnt_off00006be7.bin
fcb081f2b93e637bd932ad718ab3d3843ad1a12b2deacab69dd7e2d3fba915eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 10168 bytes
font_02_sfnt_off00008ebd.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBD 4324 bytes

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