Malicious PDF — malware analysis report

Static analysis result for SHA-256 e716cdf7eea1d4ab…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 11:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c18658644d5255af0fdeff365b7459cb SHA-1: 7bb601751f69aee137582fb22c36a71a6c97ce71 SHA-256: e716cdf7eea1d4abe7644e4df7921859fcaff7fefb3b358c63202b12fffdcddc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=position+of+adjectives+exercises+with+answers+pdf'. The heuristic firings indicate this is a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=position+of+adjectives+exercises+with+answers+pdf
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdf
    • http://files.ftfundraising.com/uploads/1/3/1/4/131453432/rolopidatajife.pdf
    • http://files.hanovergardenclub.com/uploads/1/3/1/4/131407705/bimifikujor_faxemolaxusosex_zobanodujo_rerebexesisoman.pdf
    • http://jixizem.bustransform.com/uploads/1/3/2/6/132695569/firerusavuf_zelufex_tidetuxujapa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/91620919489.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/20444777963.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/makalah_asbab_al_nuzul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/5_step_problem_solving_process.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/networks_an_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5555796470.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/30186935066.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/wesubeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/nubejafuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/subimaviji.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/zimawabewibelelez.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_off00005a59.bin
f175b77cbf3c7f4dc822e240caed39a9051898a6be70c61e20ed8b461011a625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A59 5508 bytes
font_01_sfnt_off00006d28.bin
bf7b55e7633b7163e4c3d325f38b6569ce41af3dfe28feda00042a9f3a3efe94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 10120 bytes

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