Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa50576b80e1f567…

MALICIOUS

PDF

44.3 KB Created: 2020-08-05 14:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12645b76eb9406ecfedbb9f07324d59d SHA-1: 673e886e90245da536f9b00d3dd5d3fd38335ec7 SHA-256: aa50576b80e1f567fffe192be637a480d7eb0018548da76c101881e7d3f48fad
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify and appear to be SEO spam. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, contains the malicious URL and suggests a lure for downloading an ebook.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=automobile+engineering+ebook+pdf+download
    • http://files.fbcbrockton.org/uploads/1/3/2/6/132681992/godoragakowito_papamerasu_kepilabubi_xatedagenu.pdf
    • http://files.aikendrivingclub.com/uploads/1/3/1/4/131407918/6791590.pdf
    • http://files.geeksfromthetrap.com/uploads/1/3/2/6/132695830/4613525.pdf
    • http://files.britanniabeachcommunity.org/uploads/1/3/2/6/132695278/ebcfa245937ae4.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/ralidusukosesazesoxilatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/walulawufusunedetova.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/36407796603.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/15835944175.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/bridge_rectifier_testing.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/paxofisuwetuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/87434996553.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/91037132554.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/dizobonexisepudateregaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/87886958194.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.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_off00006dde.bin
5d6077e0a613d22fe516a8dee880f416f1f03363148a8b823a45b6fd6dd99592
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 5468 bytes
font_01_sfnt_off00008072.bin
6234a2ec6c3767fe708f14c89d4a9cd4fb2bb5098c02989713611b77b942194c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8072 10268 bytes