Malicious PDF — malware analysis report

Static analysis result for SHA-256 828c686530b3ad0e…

MALICIOUS

PDF

49.4 KB Created: 2020-09-02 08:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e1f072199f6e9209285d6595af81022 SHA-1: 3e1f1211f5785376c1a91bda44e9dcd60c37bb4e SHA-256: 828c686530b3ad0e16aa9afe80f82a39acbc0210a02305ad1dfa7b105f8cfccd
128 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 `https://ttraff.club/pify?keyword=chapter+25+nuclear+chemistry+test+answers`. This URL is presented within the document body, disguised as a link to "chapter 25 nuclear chemistry test answers", and is intended to lure the user to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to `cdn.shopify.com`.

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.club/pify?keyword=chapter+25+nuclear+chemistry+test+answers
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/66322539837.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/dukifuloxedexezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_e05b1df503884adea54d64fc99932714.pdf
    • https://static.usrfiles.com/ugd/b8c837_785ed7ad92914914afe6863ecf3a8722.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1147572b55143cc93c1682e22796521.pdf
    • https://static.usrfiles.com/ugd/e643da_e7fcd54a319746b98e078f02961368e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbeaf4717e1744a3a8260b2a47c49374.pdf
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/jelajaxomipadizopikilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/youtube_mp4_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/60188430655.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/bumekobozavoxerow.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/kijifomel.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/xibibexu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7d.bin
3141030dca205b149be07f59487777cf9c81c71828541a3d16938a6b9a5f6b49
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5420 bytes
font_01_sfnt_off000070d1.bin
05f8c1dbb4161089f32bb76d0c5eee6f673259d287e7b2762f31fd4c5027007e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D1 10608 bytes
font_02_sfnt_off00009527.bin
8ea924070a1432161b16e8abb512706f5243d75abb2fd743caa3b5c5507efa82
pdf-font-stream PDF embedded font (sfnt) at offset 0x9527 16136 bytes
font_03_sfnt_off0000aa18.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA18 4324 bytes