Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ffbbba6c0526ef…

MALICIOUS

PDF

46.2 KB Created: 2020-08-24 01:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aebb42c0a2a08902cba73a95851e56a7 SHA-1: c7af4b58d7655b33f42805ef24bc955d3b8ead58 SHA-256: 35ffbbba6c0526efaafa15b351e8b7862429467117d457ead616d02d85ed2bc9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.com/pify?keyword=integers+grade+7+worksheets+with+answers'. This suggests the document is designed to redirect users to malicious sites under the guise of providing educational content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=integers+grade+7+worksheets+with+answers
    • http://gazet.downtownguestsuites.com/uploads/1/3/1/8/131856257/vutosegimusegud.pdf
    • http://files.earthenhairandbody.com.au/uploads/1/3/0/9/130969354/2029303.pdf
    • http://wuvodiki.hackmatacktrailracing.com/uploads/1/3/1/3/131378970/1535577.pdf
    • http://files.sparksprotectionusa.com/uploads/1/3/0/7/130738615/1081312.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/44345336127.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/importance_of_analytical_method_validation.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/galaziwidugaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/chemistry_form_4_chapter_1_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/rufalo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0733/4810/files/sea_group_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/oxford_phonics_world_1_vk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/72937103387.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/amparito_roca_brass_quintet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93366398369.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_off00006902.bin
5252b99fc812c19aa4b37b651eeeeac04b4cae083360231a21ffb09815e50ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 5016 bytes
font_01_sfnt_off00007a1b.bin
5b09d6c34bb2ee5c9e580e615b126192bf3946efa7967343acddd5bdde23cc40
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1B 10364 bytes
font_02_sfnt_off00009d9c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9C 4324 bytes