Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fc0feb241ce2c6…

MALICIOUS

PDF

48.1 KB Created: 2020-08-01 14:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a23acdde8e23bd2111cfd93748238eed SHA-1: c1b0dbcabe57f57a451528bace540cb0d3ff3312 SHA-256: 41fc0feb241ce2c6660e2ebbcf26fa4afbb35cac2db63134e73edace4d4e691c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as an offer for 'Spotify no ads pc'. This link points to ttraff.com, which is known for redirecting to malicious sites. The document also contains a large number of external PDF links, many hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=spotify+no+ads+pc
    • http://files.sixquickchicks.com.au/uploads/1/3/1/4/131438137/4883920.pdf
    • http://files.thediningroom745.com/uploads/1/3/0/9/130969169/kebon_sojeni_lurokifowike.pdf
    • http://files.katiefrenchbooks.com/uploads/1/3/0/7/130775221/422b3d9ea54bf.pdf
    • http://files.vawvtrampoline.com/uploads/1/3/0/7/130776656/11eedae.pdf
    • http://files.firefliesintheabyss.com/uploads/1/3/1/4/131484395/c15fc2793087b0.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/32425906261.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/22065846180.pdf
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/54813594661.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/3113954906.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/kutujetezenigezuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/69607445578.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/napubawolakumodisekutikig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/fasokipizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/kipaxupugagasaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/somufajigenitunuwomuxuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/mysql_for_visual_studio_1._2._8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/mugabumexazate.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/96305964567.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/34690844755.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_off000065e8.bin
72d4320456d0b03f3564bd25f9740281b3af4891496a2f0724da154feededa35
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E8 4896 bytes
font_01_sfnt_off00007697.bin
8555f7b713d2d4e1f59e109e00796ddf86484d4c02ac4eb537028130099c4802
pdf-font-stream PDF embedded font (sfnt) at offset 0x7697 15128 bytes
font_02_sfnt_off0000a566.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA566 4324 bytes