Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b8f63558a4bf5e…

MALICIOUS

PDF

44.8 KB Created: 2020-09-08 14:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc10048079df67e9a916635d35119b72 SHA-1: 25ff52af31e497350aedf314c863cb5515203234 SHA-256: a1b8f63558a4bf5e7a90f7ce6650841ce1760c944e45f5cb2edf19827c6b1f5f
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=exploding+box+template+instructions'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The presence of a 'download button' heuristic further supports the lure mechanism. No scripts were extracted, and the document body was heavily obfuscated, but the primary attack vector appears to be social engineering via a malicious link.

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.me/wix?keyword=exploding+box+template+instructions
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/77343848576.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/tagiwejonuvewekodow.pdf
    • https://cdn.shopify.com/s/files/1/0457/6487/0300/files/bastille_all_this_bad_blood_zip.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/varod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/5_snf_matematik_soru_bankas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/98414611256.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/animator_s_survival_kit_expanded_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6662/files/gebukafiziridisevasilap.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/22893929762.pdf
    • https://static.usrfiles.com/ugd/9e53d4_cd9a5f28640b4343ab0cb660bb799dae.pdf
    • https://static.usrfiles.com/ugd/cc1a03_72fc3b18b6a64a8b9e5319f3e50e3988.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a4d629552b34ccb84428d6a318f4380.pdf
    • https://static.usrfiles.com/ugd/bbd3cf_4438315f946d4279979772f96b20ad36.pdf
    • https://static.usrfiles.com/ugd/c33cdb_c2d505859353426dbdac30b0de7adf32.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/73571404787.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/anatomy_of_flowering_plants_class_11_ncert_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1356/9687/files/letra_espaol_de_la_cancion_del_tita.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_off00006e9a.bin
1dfefe624f5864919099f111b61fb25331f51761836963f41ca5892e503f402b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 5556 bytes
font_01_sfnt_off00008165.bin
b4658083c45e3a085cbda25699266498819a6368032c70ffde6a42630b07fbea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8165 10804 bytes