Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfee4a76123dec4e…

MALICIOUS

PDF

55.0 KB Created: 2020-08-24 00:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6975f599fc81aec174f71d192870b2c4 SHA-1: ae34023585e75eb85cda1cba210a0cefd0645c25 SHA-256: bfee4a76123dec4e0777bec13402db4fd7ba331ebd1097a9e875a242f117d767
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=holla+video+chat+app+apk'. This indicates an attempt to lure users to malicious infrastructure, likely for phishing or malware distribution. The document body, though heavily obfuscated, also contains this URL and other links, reinforcing the social engineering aspect. The presence of a PDF link farm heuristic further suggests a mechanism for distributing malicious content or SEO poisoning.

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=holla+video+chat+app+apk
    • http://giginune.domaszeromskasmusic.com/uploads/1/3/0/8/130814017/zugoku_sutosaso.pdf
    • http://files.owsleytilecleaning.com/uploads/1/3/1/4/131453998/gujitodobo.pdf
    • https://cdn.shopify.com/s/files/1/0450/5577/0776/files/newspaper_activities_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/vavolirezopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/89222494477.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0464/6676/0856/files/riddle_answers_and_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/muxanefopuredidefiroje.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/kenmore_50_pint_dehumidifier.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/dukozizerofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/nivobudasubamexunuke.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/91503970395.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
stream_006_off0000ab9e.bin
564fc7591070c1516d5bfffce99cfaeada403de4e0272a20f3eb6ff6a2a43624
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAB9E 21040 bytes
font_00_sfnt_off00004fef.bin
c3cbcd9a3cf66a5949f1240fb85d761ffc7f3e3d0d4beb6f5e2194a834a8e263
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEF 4972 bytes
font_01_sfnt_off000060d3.bin
cd80f1c9f1466931c96618f88261192a75bc2044ae8e80b55509abcdc7614789
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 12988 bytes
font_02_sfnt_off00008816.bin
d3342bf454dad5166307edaa692b46f2f2389b7de129880f02f8fef3cf24a114
pdf-font-stream PDF embedded font (sfnt) at offset 0x8816 10380 bytes