Malicious PDF — malware analysis report

Static analysis result for SHA-256 386af8ded66fbb37…

MALICIOUS

PDF

49.7 KB Created: 2020-08-05 10:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7759e56ac9a33852e13359eadd414009 SHA-1: de3452bfc23d69a5b8b9fda3217cabbd6ccaf3bd SHA-256: 386af8ded66fbb37daf828a482a0349567367679d6b3d7ee06e75b15cc0da7f8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=receptores+nicotinicos+de+acetilcolina+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The document body contains garbled text but also includes the suspicious URL.

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.cc/pify?keyword=receptores+nicotinicos+de+acetilcolina+pdf
    • http://ruxim.readingswithkaren.ca/uploads/1/3/1/3/131380729/vegurezafa_sepebok.pdf
    • http://files.northjeffersonrepublicanclub.com/uploads/1/3/0/9/130969577/9e8006fa918b6d5.pdf
    • http://files.andbardc.com/uploads/1/3/0/8/130873769/8113143.pdf
    • http://files.coolblue-bb.com/uploads/1/3/0/7/130775515/mumofomom-falanoxij-pijaforexemuvib.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/badatixewetinukew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/abedular_de_canencia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/belududeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/68593367526.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/the_binding_of_isaac_rebirth_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0431/5240/8742/files/givupovekilivesuvoxom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/90926182299.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/oregon_dmv_accident_report_fillable.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/
    • https://cdn.shopify.com/s/files/1/0431/0230/6

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081a8.bin
632c989d8a3f21cc684b4c31af8aa0c8369258c20bde12a9477311f4bdadf9d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A8 5156 bytes
font_01_sfnt_off00009348.bin
37fc706632968583b209a709c2c243db6a18fc0310eeebee3ccf736766589006
pdf-font-stream PDF embedded font (sfnt) at offset 0x9348 11040 bytes