Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e8c7e5761be9f0…

MALICIOUS

PDF

84.3 KB Created: 2020-08-08 23:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72b7aa71aa3a7c2d3400e6d67900833 SHA-1: 565a60d7c2027f147739edbfa44a78b6963467c2 SHA-256: 37e8c7e5761be9f0aa51aec61e001fc46f096934fa48c512f0110a2407c2ea8b
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly suggests a phishing or redirection attack. The document also contains urgency language, further supporting a social engineering pretext.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ara2+bula+pdf
    • http://files.albcountry.co.uk/uploads/1/3/1/3/131397946/porijubemerupom.pdf
    • http://files.juliabuntaine.com/uploads/1/3/0/7/130738714/kadukenelal-nobobonivi.pdf
    • http://files.bluecrescentstudio.com/uploads/1/3/2/7/132740413/lexifik.pdf
    • http://files.independentauthornetwork.com/uploads/1/3/1/4/131482968/kewokuxubed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/bernard_purdie_let_the_drums_speak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/12006235510.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/samsung_m2020_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/tigafepif.pdf
    • https://cdn.shopify.com/s/files/1/0439/2599/5688/files/bubipimadikibunujuduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/java_oracle_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0440/5939/4213/files/79594322153.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/44463601347.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/rizuxegipaxejewokimeke.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/guzorasifedakogigagaru.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/15666616710.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/22545417614.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/weneman.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea9.bin
5bfc7ab05438819cdaa62c853d0078f95d0e5acd22c560b8f278381ce2557244
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 4540 bytes
font_01_sfnt_off00010e0f.bin
1a395301d997497b94fb2c4e5c94db30d35ec46221d26ecc7a200de9cfc2e253
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 12248 bytes
font_02_sfnt_off0001359a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359A 4324 bytes