Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68a6816bafa12a5…

MALICIOUS

PDF

122.0 KB Created: 2020-08-01 06:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0c0899d710971e27c6b274502800767 SHA-1: e5223fc9634151e020c744d465c78d869c18ecd9 SHA-256: b68a6816bafa12a54572bd0eeed32e1019e589bf8a5a6e441000acdcc9ac0cc8
154 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=mh4u+key+quests'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious URL, suggesting an attempt to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=mh4u+key+quests
    • http://files.quinkydinkdonuts.com/uploads/1/3/0/9/130969194/jozop.pdf
    • http://files.summitviewchurch.net/uploads/1/3/1/4/131453897/dadonokigan.pdf
    • http://files.dulduldrive.com/uploads/1/3/2/6/132695531/9664879.pdf
    • http://files.iconiacapital.com/uploads/1/3/1/3/131398142/begifuzan.pdf
    • http://files.mrpeebs.com/uploads/1/3/1/8/131872238/6050630.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/figilebi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/roxunivifimusul.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/pazawamolor.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/90780706183.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/javataxazonegabudase.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/16140107215.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/9619500626.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/17463779941.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/tisonagadijerol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/96366629800.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_off0001826c.bin
88fd8c47d7088603d70fb34079be11cd1f0b78759d60d22e329e88a43a415701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1826C 4440 bytes
font_01_sfnt_off0001919a.bin
cafafaf7346fccef0b89d2a8133e664e8346ffb68c2a952fd3886b604d09b141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1919A 10624 bytes
font_02_sfnt_off0001b5e5.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5E5 16092 bytes
font_03_sfnt_off0001caac.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAAC 4324 bytes

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