Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0a6c8d5519ef3f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 04:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c289d6e07be6977073dd2a5f541226b SHA-1: ec4331b014e10294fec7025392c5dade3b640783 SHA-256: fc0a6c8d5519ef3fd46d5515bc79995aff8423a391fc8d2d3ef16645a630f778
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary malicious link, https://ttraff.ru/pify?keyword=rrb+stenographer+syllabus+2020+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the syllabus and the malicious URL, suggesting a lure to trick users into clicking the link. 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=rrb+stenographer+syllabus+2020+pdf
    • http://files.oldhamcountypolice.com/uploads/1/3/2/6/132695200/videvifi.pdf
    • http://wudivuga.kenshoneybeefarm.com/uploads/1/3/1/4/131482975/7226206.pdf
    • http://files.nwrilg.net/uploads/1/3/2/6/132681823/ba7219b751f.pdf
    • http://files.delusionandco.com/uploads/1/3/1/3/131384333/597765.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/sivemivinubisopalede.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/6593278834.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonixalekena.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0512/files/78329787598.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/36280525905.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/vitufimakivuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/67231537064.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/99040167991.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/80165661536.pdf
    • https://cdn.shopify.com/s/files/1/0434/3129/7185/files/d_d_5e_blank_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/55629274497.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/74690740261.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_off000063a7.bin
d15a78c42637d586894301234764d0265a4d3c23599edacb8525f5648b79748f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 5824 bytes
font_01_sfnt_off00007778.bin
7953bc04a0c1d5529242f1466f036f1037dedf5dd8664bc148e2076e5a2f1957
pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 10180 bytes
font_02_sfnt_off00009a68.bin
f541321e93c858118169b8e22bfec2f18f3bf4792e5fd506dba022e8110ea160
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A68 4260 bytes