Malicious PDF — malware analysis report

Static analysis result for SHA-256 8938f75f834d81b0…

MALICIOUS

PDF

37.5 KB Created: 2020-08-08 19:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1904f149861a26ce22447404a88ad3 SHA-1: 7165b3e73c603e7016d52c85f7b61cc36adf5b31 SHA-256: 8938f75f834d81b01409473351640b1efa2d64545c52aae0738b9e2bb1c1a37f
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.ru/pify?keyword=tutorial+agisoft+photoscan+espa%25C3%25B1ol+pdf. The document body, though heavily obfuscated, contains this URL and other links, suggesting a social engineering attempt to lure users to a malicious site. No scripts were extracted from this sample.

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=tutorial+agisoft+photoscan+espa%25C3%25B1ol+pdf
    • http://sepasutad.foundationsfirst-ni.com/uploads/1/3/0/7/130739625/4446385.pdf
    • http://files.ssndesigns.com/uploads/1/3/2/6/132695738/votawaves.pdf
    • http://files.thsbaseballdugoutclub.org/uploads/1/3/0/7/130776175/1c851578a.pdf
    • http://files.michaelandsydneylovepi.com/uploads/1/3/1/4/131482953/613ce0fe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/8358845578.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/fekufupogubafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/97692145623.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/71741757271.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/html_canvas_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/18948036143.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/xetofapufigimer.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/tusoxawete.pdf
    • https://cdn.shopify.com/s/files/1/0433/4836/1375/files/balanceamento_de_equaes_quimicas_exercicios_com_respostas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/abide_in_christ_murray.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/52529205811.pdf
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/56923992428.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_off000045c7.bin
0ce5ad703272a4ff8f35879cc669ca34d014c1dc1511a6d104deca5a67070218
pdf-font-stream PDF embedded font (sfnt) at offset 0x45C7 5460 bytes
font_01_sfnt_off00005808.bin
1b21e5350da1ad89203e7663a6aae72e8194cc576c3559764bdd3a6955872152
pdf-font-stream PDF embedded font (sfnt) at offset 0x5808 9800 bytes
font_02_sfnt_off00007870.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 4324 bytes