Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2faaf5baefdc732…

MALICIOUS

PDF

50.9 KB Created: 2020-08-20 06:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72fc7d154f60888e383df06bd0564d4 SHA-1: ebde71f146e534d28baec98fac52ca1d20ae5426 SHA-256: b2faaf5baefdc7325372057a5d3dbeecd80a468cede041c74ec697463b6b1435
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=exponential+form+calculator+answer', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to redirect the user to malicious infrastructure. The presence of numerous links and the malicious redirector indicate a phishing or social engineering attempt.

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=exponential+form+calculator+answer
    • http://kixukazaz.moanalipopo.com/uploads/1/3/1/3/131383664/xemakopisetajof-lilut-bakozakoxotunob.pdf
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdf
    • http://ketuxi.sondayhousefellowship.org/uploads/1/3/0/8/130814411/basapuxodipufovesi.pdf
    • http://files.thetravelenduro.com/uploads/1/3/0/7/130776126/9e547.pdf
    • http://rumun.privatecounsellingandmediation.com/uploads/1/3/0/7/130775565/6f575.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/rinoskopi_anterior_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/clickfunnels_image_full_width.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/cancer_research_brand_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/kebotajizotamolifog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/jirajaviwamefaxekudufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/17304612647.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/xonebajimin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/affordable_housing_solutions.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_off000064de.bin
06aa64daf6c9d1ccf99f404dec9fd4de8f887df9258e1a4fa03c6dd09b18cad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 5280 bytes
font_01_sfnt_off000076cd.bin
c65ed902d709ac3d7b9e8c8e637d4ad582ee431ddc9c100c8246047276c51dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x76CD 15240 bytes
font_02_sfnt_off0000a7bd.bin
e3d583ca8131484f6b7e9991674a220a85ec8466745261d702706f92b0246cac
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BD 16080 bytes