Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82d4cb119fc8640…

MALICIOUS

PDF

47.3 KB Created: 2020-08-23 16:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dbf5e204d7e23392323c91cd6104e64 SHA-1: 89e63f4ed7289572afb4622a0e8935c1411be93a SHA-256: c82d4cb119fc8640c22c74cb1bb23511156ca717f4741e59099eab330f42aae3
128 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 and a link farm, indicating a phishing or scam attempt. The document body explicitly mentions 'Avast cleanup pro gratis' and includes a URL that redirects through 'ttraff.cc', a known malicious redirector. This suggests the document is a lure to drive traffic to malicious sites, likely for malware distribution or further phishing.

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.cc/pify?keyword=avast+cleanup+pro+gratis
    • http://gujakege.travis-wayne-goodsell.com/uploads/1/3/1/3/131383483/roxanabonojifunozoza.pdf
    • http://xalat.kateholland.com.au/uploads/1/3/1/6/131606339/c45c53d47f.pdf
    • http://files.elevatecbdcosmetics.com/uploads/1/3/0/7/130775592/5d35ad0cdad17e8.pdf
    • http://files.ajharrisphotography.com/uploads/1/3/1/3/131383737/8727016.pdf
    • http://files.nwosciencefair.ca/uploads/1/3/1/0/131070612/filuv_tomalunido_dinuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6952/9509/files/kanapatusosodosazum.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/bach_mass_in_b_minor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/full_bible_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/quantitative_aptitude_shortcut_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/48111806412.pdf
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/fafoguwapudodaguroduwafik.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/safety_data_sheet_binder_cover.pdf
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/64498349131.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000661b.bin
244591b8ba030bc1deadb1c299424a5064864a26929b5fb144d39ef269f621e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 5152 bytes
font_01_sfnt_off000077ae.bin
1377e146a598a7543d6bb7cacdc5c86bd5027ddec5f3a07de1c20354bc5627cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 10360 bytes
font_02_sfnt_off00009b4c.bin
f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4C 16144 bytes