Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5d436e8dd86bd3…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 19:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38fec8302c66fcc2f736aadc053b1d45 SHA-1: 258b0e6555c84e49c428700c10db0e3f2c63ba96 SHA-256: 1a5d436e8dd86bd3b9605f57187f836986f6b34d91414067c2456596f3b0303d
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, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Corel draw x6 portable' and a URL that matches the redirector. This suggests a social engineering lure to trick users into clicking the malicious link, likely to download further malware.

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/wix?keyword=corel+draw+x6+portable
    • https://cdn.shopify.com/s/files/1/0461/7633/8073/files/52302107041.pdf
    • https://cdn.shopify.com/s/files/1/0438/0481/9613/files/computer_full_form_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/aospine_thoracolumbar_spine_injury_classification_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/mapamundi_con_nombres_y_division_politica.pdf
    • https://static.usrfiles.com/ugd/b8c837_39a3f44cf804498ea10c6a147c3aed1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a4cee9358854ee29a3e77308ee60d54.pdf
    • https://static.usrfiles.com/ugd/b8c837_778fabad083c45bcac7329df819bf7d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_41f19905edf34f9a986eb07254d8b5ea.pdf
    • https://static.usrfiles.com/ugd/05900a_c31860df91f44e9da21c137490edf1d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1eb702da17994c0290abf58c1edf473f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e861cdc6299c4cf8adb30d40da9b057c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f0d6ebb48224e0291c738e83f12f25a.pdf
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/ti_30xa_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/momotatul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/41693795034.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/xivabonoxoxabexaxof.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_off00006674.bin
813c716f777bf9c7822a218c7cee9a050a61fdc3485163f595ae043c941e202c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 5136 bytes
font_01_sfnt_off00007807.bin
86904660c72394158a75be5e04c20936b188ba3660c9993adc11e072eaf713cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7807 10772 bytes