Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8e92748a05e938…

MALICIOUS

PDF

79.0 KB Created: 2020-08-31 06:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19de7ea13be70ef697242e5c88af97e9 SHA-1: 00b0a2a96dc16f7d959202fa13887a2849f0441c SHA-256: 6d8e92748a05e93811bb9bbabbc358a506d967e20fc3a74790ca4aafb1e80af3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDFs, forming a link farm. One of these links, https://ttraff.cc/wix?keyword=ping+g400+lst, is identified as a known malicious redirector. This suggests the document is designed to lure users into clicking through to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=ping+g400+lst
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/76156b_4f60e7ee95ce4a2f850262fdb75c5dd0.pdf
    • https://static.usrfiles.com/ugd/4dd980_7519c513801349fdbc4c3c671f8ace02.pdf
    • https://static.usrfiles.com/ugd/cc03df_bb8f6562641e4947a19317304fcd6170.pdf
    • https://static.usrfiles.com/ugd/52b593_12dc7fae680f4cf3864d4bcce9d08264.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/9409630438.pdf
    • https://static.usrfiles.com/ugd/0c268c_f0580c0348e84045a6d39bed73f3e3e5.pdf
    • https://static.usrfiles.com/ugd/c63dba_409851fc63ff4ee3bbfdc04c9f970695.pdf
    • https://static.usrfiles.com/ugd/3fc21f_07e0b737c1e4457d9f56784e470a47c3.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_ad55635a558a45218ad2ca8c9979d5dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9afb56d162f846aba42bc74130858379.pdf
    • https://cdn.shopify.com/s/files/1/0460/8399/7860/files/solving_equations_with_fractional_coefficients_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7880/1822/files/90574833702.pdf
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/ladutasumisorezozokefe.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee46.bin
fb7d862cf178be94b5dba28617d71512457883fe5ac342b84801a776b7c90a26
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 4336 bytes
font_01_sfnt_off0000fd02.bin
59f15c1cfbf7e5a7226750aa43a92a35f1aaf34681ba1a3b4e41e0cd51bdc2e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD02 10544 bytes
font_02_sfnt_off00012115.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12115 4324 bytes