Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f09b1a86328ef86…

MALICIOUS

PDF

45.9 KB Created: 2020-08-07 07:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2449e81a91fc07885fca6a7a364cb458 SHA-1: cd6852fd7337f54098b14cbe14df789943f5f74d SHA-256: 7f09b1a86328ef865f1d935889ffc96eb7360eebeeabfdb6478a7fee6f213b2a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented in the document body, likely as a lure for users to download content. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary IOC is the malicious redirector URL.

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.com/pify?keyword=fahrenheit+451+study+guide+questions+and+answers+pdf
    • http://files.windsweptpoodles.com/uploads/1/3/0/8/130874213/4441498.pdf
    • http://files.48layers.com/uploads/1/3/0/7/130775950/2e4f92adc61465.pdf
    • http://files.noretasdecor.com/uploads/1/3/0/8/130814121/nibamire.pdf
    • http://files.lorivonderhorst.com/uploads/1/3/1/1/131164157/veludu-tarixig-keturavib.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/sujet_brevet_maths_2020_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/kufewatifijogikubame.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/2210221698.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/64627086557.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/tadikirajofuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/asian_games_2020_medal_table_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/57038068778.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/jopijexefofukifinunuzen.pdf
    • https://cdn.shopify.com/s/files/1/0432/3177/2835/files/noditir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/mogoboju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/pebesugorevumoj.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_off0000731c.bin
136becae3ef432ca304d6f23433e24d9373a2ef4111b81094fdc9d49da425c7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 5812 bytes
font_01_sfnt_off00008703.bin
84572be3cf0d2a7bc6fb7fed726295c2614efd6c30643cd2f19dfdd7eaf5235c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8703 10328 bytes