Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa59c14ef8cba98…

MALICIOUS

PDF

41.3 KB Created: 2020-08-09 19:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1a19d4c485c7b61f29e60ce0db69ebc SHA-1: b1d28a95c2bfef174e8cf0a75149ac11e52c3564 SHA-256: 1fa59c14ef8cba98e931135c4bc37f77888d1eaeeda6a7ff65625daadf9e3513
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=testing+speaking+skills+in+english+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to 'testing speaking skills'.

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=testing+speaking+skills+in+english+pdf
    • http://files.thriveatwork.com/uploads/1/3/1/4/131452840/fibabusukatutakodav.pdf
    • http://files.kozynook.com/uploads/1/3/2/8/132815183/1609101.pdf
    • http://lujox.tbylaccessories.com/uploads/1/3/1/3/131383791/vasexof_sulija_gawina_fagafezamero.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/dawn_on_a_distant_shore.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7650/files/10137409339.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/77879581765.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/pro_tools_le_8_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7463/files/fejopuzokikuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/nexevave.pdf
    • https://cdn.shopify.com/s/files/1/0438/1048/8477/files/x_marks_the_spot_runescape.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/65344091178.pdf
    • https://cdn.shopify.com/s/files/1/0433/0474/7168/files/60382590304.pdf
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/48966412630.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/wesugalofaxaduzovajukido.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/kunilalivuzuvabenevexuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/bavenejisifapotazak.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/36762850335.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/remyzero_save_me.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_off00006329.bin
8fb58beacae0e323f03f83579a2f259b0e3b2f7c8144a8ca298b197ba06795b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 5220 bytes
font_01_sfnt_off000074f1.bin
fdce365f22d399ff6e4465259e9aa16ab9fc7175d782a60d9b19c77e69e61098
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F1 10376 bytes