Malicious PDF — malware analysis report

Static analysis result for SHA-256 000ebb5f77c819d8…

MALICIOUS

PDF

68.9 KB Created: 2020-08-10 01:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b863a610d3808f10b9eb5449c120f6d7 SHA-1: cb50ef366569d79c859688cb916920dcae88b0d4 SHA-256: 000ebb5f77c819d8e165186142ec30f0045f6948a1bb15b23dd6257cf8afa052
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a document about "cathodic protection for storage tanks". This indicates a phishing or scam attempt to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=cathodic+protection+for+storage+tanks+pdf
    • http://files.lostlove.co/uploads/1/3/0/7/130776644/sevowisidojinipo.pdf
    • http://files.cgpacademy.com/uploads/1/3/1/1/131163932/fb7f0a.pdf
    • http://files.csecmathtutor.com/uploads/1/3/0/9/130969525/3954850.pdf
    • http://xenabazal.dmrcrafters.com/uploads/1/3/1/1/131164250/85822c5744461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/nosiwutupipidorifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/luzafewojibagufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/verbal_ability_for_cat_by_sujit_kumar_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/xumemoruvejesesas.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/importance_of_adapted_physical_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/58553129859.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/75874178386.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/70972383203.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/tuzojezidi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/8986714154.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/18506174607.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b10e.bin
115ff0db35fd96a9315de1aba23ad41f9b9adae07874a5e0b04c2055f259765e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB10E 5352 bytes
font_01_sfnt_off0000c33c.bin
3bfdf8a4eed73c8f5bca67dad7957dff0c37948d0a2ad516d77c942cf6d5206a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC33C 13772 bytes
font_02_sfnt_off0000ef23.bin
a2ccb5d48230d7d8f448e6249ab49e399f57495b0900213d943f46bdfb0efea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 16092 bytes

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