Malicious PDF — malware analysis report

Static analysis result for SHA-256 131e6fb9313cf096…

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 15:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb7f12136326444b627673849f46e0d SHA-1: 558692a382ad98d834624565c276862e0ef460c2 SHA-256: 131e6fb9313cf09683f7b2b149b12a9cbd3d2d680b15067c4e40ad82d4ad8df6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, with a critical heuristic identifying it as a redirector link to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.cc/wix?keyword=brazzers+janet+mason' is likely part of a link farm designed to drive traffic to malicious sites, potentially for phishing or malware distribution.

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=brazzers+janet+mason
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_86c3105b21f642268e0bc34ba3512bab.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_95ffb05acfb3413f921522c7521558f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_de9313b406d64784937543534630954f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7005530455844639a6d12986b0729cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_517b4ec932634a7c88d540facb71d5c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_407c605c881c44f1a4d6a1741ebced12.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e11ff3e91fc41cd85f632d0b3ccf2ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_d422ec1068354474a274f0a8a3d3554d.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2994/files/4_digit_addition_without_regrouping_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/6996/4439/files/zilesarubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/1459714597.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/harbor_breeze_remote_program.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/fedejaboviwuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/55991956682.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/49236647635.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/goramewedomiwobafezoju.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d67.bin
a6a6e9132e3807813147d88d97c91284ffc2bdbdd471e5f2399f751f089697d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D67 4712 bytes
font_01_sfnt_off00005d4f.bin
0acf52e57079a91dc0550469459f1123e7f81bcd87cfb08f9523c470751261ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4F 11716 bytes
font_02_sfnt_off000083e7.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E7 16204 bytes
font_03_sfnt_off00009916.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9916 4324 bytes

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