Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4c5faf3b5a62ad…

MALICIOUS

PDF

43.4 KB Created: 2020-08-10 23:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f8447cf2b1035b59a4d67770d15944f SHA-1: 6132fe5f73f3853b0cd63b796a9c6ecab3be917c SHA-256: 4d4c5faf3b5a62ad53547acf05d0e825a24d1637e91c94b84698d1c1aeb5c9e6
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains multiple embedded links, forming a link farm, with a primary redirector pointing to a "first bank aptitude test" lure. This suggests a phishing or social engineering attack aimed at tricking users into downloading further malicious content. The document's structure and the use of a redirector indicate a sophisticated delivery mechanism, though the specific family remains undetermined.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=first+bank+aptitude+test+pdf+free+download
    • http://files.deadliftbrews.com/uploads/1/3/1/4/131437444/989457c.pdf
    • http://files.capitalcitycupsc.com/uploads/1/3/0/7/130776503/siladavuwavo.pdf
    • http://vojapuv.bridgewatercallingtonraiders.com/uploads/1/3/1/3/131384401/1180310.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/8635100495.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/lakotolabukixivawipeboz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/fapugonugukoduwenob.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/97217670501.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/7210569688.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2305/files/nipupiwasezusijopixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/sozorabekawet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/direct_path_internet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59577082877.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/78773988631.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/20663694294.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/24162800858.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/48257728586.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/17302200038.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_off00006917.bin
24804d150428639feb0b2034ef03c6567846ee92f1ed8b3fe9189320e3015143
pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 5288 bytes
font_01_sfnt_off00007b2b.bin
d5c215a71fc2e6b623984972c1ff538fe58603d9055b7476c8b83044d5ee11b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2B 11076 bytes