Malicious PDF — malware analysis report

Static analysis result for SHA-256 49edfb1896681f13…

MALICIOUS

PDF

48.2 KB Created: 2020-08-16 19:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e27c229a1c89e67cee69e25c87788d SHA-1: 608064be0a23a0d5aab60f232736b64b071a731d SHA-256: 49edfb1896681f1314a3bd2fbe4991c7a70b8e2184f85a5eabb326a7fea8cb7a
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the malicious URL. The presence of a 'Password-protected archive lure' heuristic suggests this PDF is intended to trick the user into believing they need a password to access content, likely to bypass security measures and download a payload from the redirector.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=calculator+gallery+vault
    • http://kuruwog.sarahchristl.com/uploads/1/3/1/4/131453177/fcea46f41b.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/206_582_7964.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/mutosafivibubuvetul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0455/7858/4229/files/dsm_5_criteria_for_bipolar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/xizoxupokax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0141/files/long_kiss_goodnight_cast.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3408/files/download_biochemistry_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/aims_and_objectives_of_partnership_firm.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/92874743948.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/sujizawujax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/eritema_toxico_en_nios.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006731.bin
247daef919337636a3fbacaa932a477e9d020062c2620bfcbb6776bf52d659d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 4704 bytes
font_01_sfnt_off0000774c.bin
976be7bfb4346775e71ba64ad65a5003c9fddc2fff4b39a0ac241371ce4e6f12
pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 2312 bytes
font_02_sfnt_off000081b8.bin
86e07efd3c9697882a79b6ea6fdb4b77014745c86933037c792da8fd1257f147
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B8 10596 bytes
font_03_sfnt_off0000a5da.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DA 4324 bytes