Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffced67f4ce9ddd9…

MALICIOUS

PDF

52.7 KB Created: 2020-08-01 13:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53539e12eac3eb934273086e347865d2 SHA-1: 7e00b1f5d0467b235514b02a89fa2eb485034f91 SHA-256: ffced67f4ce9ddd9aaab38f7f2de6fe2b95bda8316bc15dd465223c10143b814
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to editing the hosts file, likely as a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content-spinning operation designed to improve search engine ranking and distribute malicious links.

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=how+to+edit+hosts+file+windows+7
    • http://files.sdhdesignbuilthomes.com/uploads/1/3/0/7/130738704/9769434.pdf
    • http://files.houseoffortune.ca/uploads/1/3/0/7/130738822/bca8f61097875.pdf
    • http://files.5degreespsychotherapy.com/uploads/1/3/1/8/131856392/fowizusesatedaw.pdf
    • http://files.vyod.us/uploads/1/3/0/8/130874231/8ce935bbc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/jedibomadotuwol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/fojufofuda.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2583/files/visimipujonumiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/19367877347.pdf
    • https://cdn.shopify.com/s/files/1/0432/8574/1726/files/auditoria_administrativa_interna_y_externa_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/77046913322.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/pogofoxevosizanuwazir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1413/files/tafilobatadukatule.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/24704433072.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/jaxizaduzuromigir.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_off000091ba.bin
0f278cbd1ba8e548673fcd550ab73e3dd1a46246ad20762699e601aa510015af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BA 4820 bytes
font_01_sfnt_off0000a23c.bin
975eb33f945dea05f1e8393af2804124077eb3e5d7cfc4716f4500284f025da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA23C 10420 bytes

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