Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d88d5b90431bc1…

MALICIOUS

PDF

48.1 KB Created: 2020-08-24 11:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50e50743c52c519ec699c7bbe2c32ca SHA-1: a34c9fb98879b378b4997ad7f52921e0049becdc SHA-256: d1d88d5b90431bc1fc8ec6913835b252a0974b4de817484004a2d28d7e816000
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=behringer+xr18+manual+pdf'. This URL is presented within the document body, disguised as a link to a Behringer XR18 manual. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=behringer+xr18+manual+pdf
    • http://mozulupe.jamkatzent.com/uploads/1/3/0/8/130814311/8b1e25b40.pdf
    • http://files.grandmassoapandstuff.com/uploads/1/3/1/4/131436956/nopevifinojategum.pdf
    • http://files.rockintmeadows.com/uploads/1/3/0/7/130776374/4a8efabd.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0122/files/gemepawasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/ccrn_practice_questions_with_rationale.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/gexogizanivemoxepefipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0259/files/lafemaxinuxigogorevuvul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/fenukovukane.pdf
    • https://cdn.shopify.com/s/files/1/0454/2021/6476/files/fast_car_colouring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/sharing_economy_platforms.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/android_version_8_logo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7879/2869/files/12507790265.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/92752600541.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_off00007c35.bin
3e8e46fdbec4fb5d8afcb26411805b006b9ef13d678ab27051f8059a4982c4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 5640 bytes
font_01_sfnt_off00008f46.bin
c317556118c795abdc10396a6ab94e89b58146e3dec561eab75ffb55e1d65720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F46 10868 bytes

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