Malicious PDF — malware analysis report

Static analysis result for SHA-256 388bd00d876154cd…

MALICIOUS

PDF

58.7 KB Created: 2020-08-20 01:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd125000c3af6fb707d0dd995a94da48 SHA-1: d6b59bd820f504cf042e8d24c32b73d9bf80a50e SHA-256: 388bd00d876154cd21c20e6ea7d70bcb1e68ec245b475c1e377e2ff39cba3a78
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a movie download, which is a common lure for phishing or malware delivery. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to distribute content or lead users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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.ru/pify?keyword=avenger+part+3+tamil+dubbed+movie
    • http://files.cowboyjamboreemagazine.com/uploads/1/3/1/1/131164067/selonudunetubu-wutajedufitusuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/512704415.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/piwufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2511/files/sosatakug.pdf
    • https://cdn.shopify.com/s/files/1/0448/0493/1746/files/the_austere_academy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/xunope.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/korabudezepogejeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/45500096480.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/tevedur.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/dasgupta_vazirani_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/xomodepupowinabowakutovep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/dured.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_off00006f3c.bin
1ebe7b27009ad8ef0665930760ef94a921cfdfd377bda27f56f3b18eaac61aab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 5336 bytes
font_01_sfnt_off0000813b.bin
84cf462b7d9e7e56f2ba3fb60cb1f202000d61313d0736caf4e161c994500bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 10740 bytes
font_02_sfnt_off00009e48.bin
6f76aace05e52a5a6989f567b0a028f014faf94f5205eca83876366752fd3a81
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E48 15848 bytes
font_03_sfnt_off0000cf4c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 4324 bytes