Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c379d09bd437bb…

MALICIOUS

PDF

46.2 KB Created: 2020-09-01 16:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbd9edffd519a13c33835e1e810aa1cc SHA-1: 838140cd501d6e13d0d101eca887852c89a2c384 SHA-256: 72c379d09bd437bb47a310ed0f4398f7920fb65ccb6219bf7b1f6d8e0b88e0c5
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'Altersvorsorge 2020 reform' and the malicious URL, suggesting a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the link.

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.com/wix?keyword=altersvorsorge+2020+reform
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/add_appendix_latex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/5779447300.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/waximoganelipejufefumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/pekifelalo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/diagnosis_and_treatment_of_osteoporosis.pdf
    • https://static.usrfiles.com/ugd/64d889_4fd1b086a2b644c99efd297bbe32e46c.pdf
    • https://static.usrfiles.com/ugd/b6edda_ab0393951dc84d148618e306d04800b2.pdf
    • https://static.usrfiles.com/ugd/45e30f_8d8d72594795423580ab812944869dfe.pdf
    • https://static.usrfiles.com/ugd/bb13a2_445c80a9eafb40d6b09477c83e831d1c.pdf
    • https://static.usrfiles.com/ugd/c0b427_8e1786aedd2641d6bc103221004e2d48.pdf
    • https://cdn.shopify.com/s/files/1/0432/3442/7047/files/classes_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/wuwugaxifixawevegopud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/cox_tv_guide_las_vegas.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_off000067bc.bin
9ecb4c17e114b39e8eaf8d9645148a8abc276a6d0044a96a01fb63f891e25c55
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 4832 bytes
font_01_sfnt_off00007840.bin
e1594c83144be4b412bead586ff3577ea776566af31878e47852b4746124b445
pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 11052 bytes
font_02_sfnt_off00009c8f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8F 4324 bytes