Malicious PDF — malware analysis report

Static analysis result for SHA-256 420722b2c3b8609f…

MALICIOUS

PDF

42.5 KB Created: 2020-08-18 15:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b87ce0e5f6ea1e535c9d4eab1cf7e2 SHA-1: 9e760a11b9e4a09cd64830838c8ac4a443a6e374 SHA-256: 420722b2c3b8609f4c9f76810fcb2099666b8781e2f85fc24457ff5a6ac4a1e8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=high+school+science+report+comments'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious redirector URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site. The primary intent appears to be redirecting the user to a malicious resource via the ttraff.cc domain.

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.cc/pify?keyword=high+school+science+report+comments
    • http://files.searidgepwds.com/uploads/1/3/1/3/131379223/dixazutu-junef-kalomobefedi.pdf
    • http://pemon.thecococouture.com/uploads/1/3/1/3/131398140/doxedadi.pdf
    • http://files.gemmamcneill.co.uk/uploads/1/3/1/8/131857315/9380cd.pdf
    • http://files.saintjosephscatholicchurch.org/uploads/1/3/2/7/132741555/vejijinovoxav.pdf
    • http://files.tilburgmun.com/uploads/1/3/1/1/131163705/kinibapabasowap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/21391671280.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/50199483266.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/pevafofalisutunurifigafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/35049178074.pdf
    • https://cdn.shopify.com/s/files/1/0452/7525/0850/files/gadipisiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/tilidiwofufufigosal.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/active_passive_voice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/nezukexowinukodolow.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/lixagavelibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/bakitepupoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/59956881009.pdf
    • https://cdn.shopify.com/s/files/1/0434/9784/8996/files/bazusinagekewopuxesuwu.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_off000069bf.bin
7f24c9e1249a6a2fa13cb5214876eded5f1c6396411cf64b24710a270d60289a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69BF 5100 bytes
font_01_sfnt_off00007ae6.bin
b22042cf2689be68dd82e7679e204ad3a31660aa523cdcc454f2178283f6ccf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE6 9876 bytes