Malicious PDF — malware analysis report

Static analysis result for SHA-256 da58507ef87f016f…

MALICIOUS

PDF

46.3 KB Created: 2020-08-22 09:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c6017db57fe4e44ce6a957fd78571c9 SHA-1: a9813ef3dda72adc6d1f37ef4a6da7cbaead34fc SHA-256: da58507ef87f016f3b6929b89187895a7cfc4c9268f9d6a26330440324aff715
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. It also contains a PDF link farm heuristic, with many links hosted on cdn.shopify.com, one of which is the primary redirector. The document body contains a call-to-action phrase, suggesting a lure to click the malicious link. The primary malicious URL is https://ttraff.ru/pify?keyword=thoracic+cavernous+malformation.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=thoracic+cavernous+malformation
    • http://files.jencolly.com/uploads/1/3/1/6/131607232/694016.pdf
    • http://palijapij.mooreequineevents.com/uploads/1/3/1/4/131408103/3681396.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/68665531988.pdf
    • https://cdn.shopify.com/s/files/1/0436/8426/6137/files/volalep.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/21278991308.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/calculus_early_transcendentals_briggs_cochran.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/vector_addition_worksheet_linfield_summer_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/7037471346.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/minecraft_cape_uploader.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/guxunanoxaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/school_pronouncer_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/mofewimivatupokos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/two_week_calendar_template_printable.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9417/files/one_way_anova_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/sql_server_management_studio_query_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/nokiginozezajo.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_off00007778.bin
07f3b9e7a634d479dde8d3f95b0c898877a6f7f485348750c4f57b76c7de1774
pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 5128 bytes
font_01_sfnt_off000088c3.bin
d9bf064092bbd6b32c1dddaee2bc88ff190a94e9f45fa2a50e3f2d0229416120
pdf-font-stream PDF embedded font (sfnt) at offset 0x88C3 10360 bytes