Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dcf7dee0d6e7da…

MALICIOUS

PDF

42.5 KB Created: 2020-09-16 22:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36c38a1f268b8a4cd4cb71eb9defe3b SHA-1: f7a5d1abb3b7279e4794ca2e2944d92e8be7bae6 SHA-256: f0dcf7dee0d6e7dae6a4bb702646061b33f4750f3c7aeb18c9e954df903b6b77
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, https://ttraff.club/wix?keyword=harvard+air+hockey+table+reviews, points to a known malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=harvard+air+hockey+table+reviews
    • http://files.4everinelectricdreams.com/uploads/1/3/2/6/132695387/5693544.pdf
    • http://valaxamu.shopcharmhousedecor.com/uploads/1/3/1/3/131379956/3216764.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/work_performance_appraisal_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/ugly_electrical_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/nafapuziwefumax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/cantate_domino_josu_elberdin_satb.pdf
    • https://6e74b444-fe16-4d56-9a98-7a604e79b01f.filesusr.com/ugd/defcb2_26674211966344d08d4502a34bf51c8a.pdf?index=true
    • https://cd02aed7-373e-4c37-9251-88462e14949e.filesusr.com/ugd/6cabbb_dddcf929b5b54784848be8d9b6ccaa3f.pdf?index=true
    • https://9419707c-5ca6-41a6-8ce2-2fdf9ea37b88.filesusr.com/ugd/ad2ade_411b9cc4cd6d4fadbccd79254d758eba.pdf?index=true
    • https://7d0d9cf0-4626-49fd-9c31-da0c26acd5d5.filesusr.com/ugd/9ea91e_5f444721a8c841bbb84e11545f6110e1.pdf?index=true
    • https://aa295a2a-38a5-427d-bf58-52345870f0c3.filesusr.com/ugd/c33cdb_ac065866e5e5406eb492071f27a0fb08.pdf?index=true
    • https://13fb088d-7158-43d5-85ac-3f57e5ae950b.filesusr.com/ugd/9c66ff_a0601ffff2ff4c9da5eacdcfd9322956.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006759.bin
5591447a79ca325aba5d26a0bd4d51571d2b3ebde8ad186931ad346facd4754a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6759 5448 bytes
font_01_sfnt_off000079ee.bin
2afae196549b18c3714e824cadde12414a48993737090dad510a539f1160d5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EE 10224 bytes

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