Malicious PDF — malware analysis report

Static analysis result for SHA-256 af70eed404bf53f3…

MALICIOUS

PDF

56.4 KB Created: 2020-07-22 01:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6199e947ce1eb39874bdda2c5e5d891a SHA-1: bae510e5dc7c75dab4c196b10bc23ed723023cd8 SHA-256: af70eed404bf53f3bf8911ba7483d1fe838869729be96232b9bb4ad2364d6a20
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.com/wb?keyword=managerial%20interview%20questions%20and%20answers%20pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Managerial interview questions and answers pdf'. The presence of numerous external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.com/wb?keyword=managerial%20interview%20questions%20and%20answers%20pdf
    • http://files.moreeshowsociety.org/uploads/1/3/2/6/132683246/gekopov.pdf
    • http://files.cimeron.com/uploads/1/3/0/7/130739117/803763.pdf
    • http://files.foreveryseason.net/uploads/1/3/1/1/131164016/fonoremoj-kolixewe-sotewora-koxiduxebafabap.pdf
    • http://files.mailfromacat.com/uploads/1/3/1/3/131381055/6367965.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/28702980808.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/wikejirabipuwowasapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinupagudesezubinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.pdf
    • https://liwodadofig.files.wordpress.com/2020/06/sewirogatetepig.pdf
    • https://josejoxoboko.files.wordpress.com/2020/06/gimubiritagidagivexuputig.pdf
    • https://lobetus.files.wordpress.com/2020/06/tewiva.pdf
    • https://jewebobefu.files.wordpress.com/2020/07/degadibekarepapilenux.pdf
    • https://diguloviraje.files.wordpress.com/2020/06/91548404027.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/28855165039.pdf
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/65016310421.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/99912707878.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/32966009597.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/lidexifedofisojosa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/89912493616.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/43100279505.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/12888315147.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_off00009f6e.bin
4344846b473a4629b0acca4b1863088384d044170156baba0f7b3027602b06e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6E 5376 bytes
font_01_sfnt_off0000b1d2.bin
15287fe64c5f25ee66c39024b9c78fbf03d5a53a1758a3f150d4ae8f848b9e89
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D2 10032 bytes