Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2282edf1fc255b3…

MALICIOUS

PDF

62.9 KB Created: 2020-08-13 00:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd8512cd1d52bf80981940d8f476fa12 SHA-1: 851aa933e44095348708eea4546454f7c8b85a95 SHA-256: c2282edf1fc255b3de26481b05c53422cd3bb114457a69cf74b0ed0db6259dcd
128 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, disguised as an invoice or payment lure. The embedded URL `https://ttraff.ru/pify?keyword=big+ideas+math+advanced+1+teacher+edition+pdf` is flagged as malicious, suggesting the document's primary purpose is to redirect users to harmful content. The document body, though heavily obfuscated, contains the same malicious 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=big+ideas+math+advanced+1+teacher+edition+pdf
    • http://files.gruppogammawatches.com/uploads/1/3/0/7/130775126/881f3c39144.pdf
    • http://naxidul.chicoanimalshelter.org/uploads/1/3/2/8/132814930/6456490.pdf
    • http://mavobo.feliciakeesing.com/uploads/1/3/2/3/132302780/jawadanajalifol-xifakufi.pdf
    • http://files.jpressley.com/uploads/1/3/1/4/131437484/08dc056.pdf
    • http://files.non-christianchristian.com/uploads/1/3/1/8/131856232/e3f2a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/24182613316.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/embriologia_aparato_reproductor_masculino.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/29907169969.pdf
    • https://cdn.shopify.com/s/files/1/0438/5754/3328/files/84263410092.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/18711382783.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/33735463605.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/68346742458.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/gulowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/sarubemoxevena.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/kegujukuwewib.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_off0000b336.bin
e3b09a72efd354e43c9dba261783604b3b59b17ebea058f6a1ccb0e10e2646d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB336 5700 bytes
font_01_sfnt_off0000c681.bin
522acbd0abcea6a0181f6120dd83df2c4a63c69685d6c398589e4e7ea7253811
pdf-font-stream PDF embedded font (sfnt) at offset 0xC681 12440 bytes