Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36e7ba102cfc898…

MALICIOUS

PDF

50.9 KB Created: 2020-08-06 04:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30b52ba9dceed9e6443888ac9c21b166 SHA-1: e86e976f0bd4729fcf2b80c5c658cde11e30abb8 SHA-256: a36e7ba102cfc8984012bb0d923ac0e00b0e385a9bb64b7f682d0ddbfd0abeca
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link to 'ttraff.ru' is flagged as malicious. The document body, though heavily obfuscated, contains text referencing 'Accounting 101 book pdf' and includes the malicious URL, suggesting a lure to a malicious site. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document might also instruct users to install remote support tools, further increasing the risk.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=accounting+101+book+pdf
    • http://files.glenislaagainstturbines.com/uploads/1/3/1/6/131607827/ripulafovapi-pamosobavaduw-tizenexosebev-saduj.pdf
    • http://files.lorainedavies.com/uploads/1/3/0/7/130740242/bofoxeruxurab_xutadedetewiga_latibuzu_lanig.pdf
    • http://ninagaxe.beyondglamstore.com/uploads/1/3/1/3/131383544/31017a.pdf
    • http://files.neckiesbymj.com/uploads/1/3/1/6/131606345/5454481.pdf
    • http://files.ohoandassociates.org/uploads/1/3/1/8/131871745/929646f211ef.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/bevirojafibosekosexabovap.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/nazitelav.pdf
    • https://cdn.shopify.com/s/files/1/0440/7279/6310/files/64145248794.pdf
    • https://cdn.shopify.com/s/files/1/0439/4542/7102/files/tusavivonelefojipidivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/kuruzebutuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/great_is_thy_faithfulness_chords_c.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/36781646201.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/xakezozidugober.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/51906183871.pdf
    • https://cdn.shopify.com/s/files/1/0443/2723/9836/files/teamviewer_14_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/56204455122.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/85469788532.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/98623232446.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_off0000884e.bin
1afc89ca8a49c17ba712bab062b0f369587164aab2f86a4194f4ab0b21616032
pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 5192 bytes
font_01_sfnt_off00009a20.bin
c634286519bd07234c889f8ca9dc015a4d7193e70ff4570000a8184cb5624cc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A20 10724 bytes