Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c157d777431cf4…

MALICIOUS

PDF

65.9 KB Created: 2020-08-11 19:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 562a5a44d38a146aff217ad2288b42ad SHA-1: 6a4565c91ffa65ec3f8bfe27cd402677a34b56b4 SHA-256: 45c157d777431cf417be6e2531bef6ef908f521ea958466de9ee8324e5c3a92e
180 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 pointing to Shopify domains, forming a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.cc' which is disguised as information about blockchain. Additionally, the document explicitly requests recovery secrets, such as private keys or backup codes. The combination of these elements suggests a phishing or scam attempt designed to steal user credentials or financial information.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/wb?keyword=how%20blockchain%20works%20pdf
    • http://files.prettyfckingawesome.com/uploads/1/3/0/8/130874276/6039618.pdf
    • http://files.gwenwisniewski.com/uploads/1/3/1/3/131380054/maxunewuwagig_xodufedefo_bukid_tibutesez.pdf
    • http://gugok.leahkneipp.com/uploads/1/3/1/6/131606490/dadifug-xijaseviji.pdf
    • http://files.mlcw.org/uploads/1/3/1/4/131452982/waxeritotepunoririr.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/cat_312b_on_craigslist.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/22525553477.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1414/files/46893712519.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/sajoludat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8410/files/activity_based_costing_vs_traditional_costing_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/mowedan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/pabomugovatubagogalikigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/rozidajonavaxamomijomunax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/computer_science_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/kautilya_arthashastra_in_sanskrit.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c434.bin
7eceab97cb9896485a0530093ad4414bd5c032876a16c1e7456a429ddff791d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC434 5500 bytes
font_01_sfnt_off0000d6d9.bin
2f4e5685d40555d5fba8b10f195eb7382a4dfeb51a1618d0ac9200a24922e05c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 10496 bytes