Malicious PDF — malware analysis report

Static analysis result for SHA-256 522b4697dba90979…

MALICIOUS

PDF

79.1 KB Created: 2020-08-25 08:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74fed996aca9510d2de2fdbf2746bd3f SHA-1: 4909f4450fa850be071fdc7443ff2d85f58cd575 SHA-256: 522b4697dba90979f3dd6f21ac2f10e9395f23c2afebdab8312739d3edefb6f0
120 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Adsorption isotherm pdf' and the URL 'https://ttraff.cc/pify?keyword=adsorption+isotherm+pdf', suggesting a lure to disguise malicious activity. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

Heuristics 3

  • 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.
  • 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=adsorption+isotherm+pdf
    • http://files.ether1227.com/uploads/1/3/1/4/131438240/fofexefujuguxeme.pdf
    • http://lufadoruv.lancastercountyconstables.com/uploads/1/3/1/4/131407535/gilomuworojut_mibajemaseti.pdf
    • http://xafajol.isabelsherk.com/uploads/1/3/1/3/131379730/7126304.pdf
    • http://laladuru.ninthdistrictdems.org/uploads/1/3/1/6/131637136/b134f7630e6.pdf
    • http://files.kmpinner.com/uploads/1/3/0/7/130739764/nukafewipumeruwoniz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/84472438038.pdf
    • https://cdn.shopify.com/s/files/1/0440/3760/3478/files/ap_us_history_study_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/bifamatejeza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/cholesterol_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/hybridization_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/zoveve.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/78561646329.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/46306914060.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/43513396082.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e09d.bin
ce770b91debc93efbe505e85fbc627f09edd6602b7f45b09331dd005d5500f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 5028 bytes
font_01_sfnt_off0000f18f.bin
7037a40736578756a932663fb648cbb151a8f99af0106981afd60c372b28b025		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 11904 bytes
font_02_sfnt_off00011a09.bin
97f6b80edf08cc5b0df0b0498a98c215780675af88f340742e7e855906399d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A09 16104 bytes

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