Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc444f98c43da34d…

MALICIOUS

PDF

56.6 KB Created: 2020-08-05 18:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf0ba0db312023192b2c1423e75de06 SHA-1: e1e8acc8dc0329e6b9ac8e98c49ec52c1e63e922 SHA-256: bc444f98c43da34da3cca13a5063e7112c559964bbcc8619ff71eb4aaa87c8e4
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and a large number of benign-looking PDF links hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=mathematical+induction+problems+solution+pdf
    • http://files.austinhouseinn.com/uploads/1/3/1/4/131408970/7c3f2b4309.pdf
    • http://files.bathwickestateresidentsassociation.org/uploads/1/3/0/9/130969624/be3c44.pdf
    • http://files.forestgardensoap.com/uploads/1/3/2/6/132681767/dopuj.pdf
    • http://files.flagshipduluth.shop/uploads/1/3/1/1/131163914/3954245.pdf
    • http://kogixa.cyclonejerseys.com/uploads/1/3/0/8/130874254/niwomap.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/85960931986.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/fapirata.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/dd_form_2981.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/37953595112.pdf
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/j._cole_born_sinner_tracklist.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/nuwelatanefaxefuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/fatupotugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/66246263902.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/valosepevinawobaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/27464934121.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/all_human_body_systems_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0432/3852/3047/files/9472481502.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/56685505060.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_off00007ea0.bin
fde3a927545a60ef43d02ef429a56f91e9a24132edc688a17e4841c9dadb6020
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 5540 bytes
font_01_sfnt_off0000914e.bin
e67cb8d04e46608bd22ea3aa333b8f444588a7ddbaaedc9b1e7b3cd3f9706cbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x914E 14524 bytes
font_02_sfnt_off0000bf88.bin
93e0cc282fa2811fe6f06abb82736e9d01999a8214118d9977962657a40fae05
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF88 16208 bytes