Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c1272c42fcd22c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 13:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 241f6277679cb7ab98970397eacda171 SHA-1: 791f578ca29486d1789296ee8bd26a0c44c25945 SHA-256: e6c1272c42fcd22ce2378aaa79838253845ad6744b33671ed2b72155420da8f9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=browder+v+gayle+pdf', which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of many Shopify links, some confirmed benign, may be an attempt to blend in with legitimate content.

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=browder+v+gayle+pdf
    • http://files.buttersideupcakes.com/uploads/1/3/2/6/132681456/rapawamuroratuj_nuxokameju_tavukarukevefur_rowixakalidevon.pdf
    • http://files.housewifepreneur.com/uploads/1/3/1/4/131453917/jafuz.pdf
    • http://files.mychefg.com/uploads/1/3/1/4/131453733/21a7fa.pdf
    • http://jezikebe.rfdlawfirm.com/uploads/1/3/1/4/131438392/6336395.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/dorakudopubodazepeko.pdf
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/bubixafotowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/94096609149.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/58169253634.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/84345630509.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/fokawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/kutijuwofinebafalokarota.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/rexula.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/eso_healing_springs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/bizomutubujuwurigamoko.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/65248367893.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/naleg.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/93247586657.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d9.bin
58f0e7f7058aa854b2ac1f92bee2dbf9fb27934dc8c386fd30637328de41969c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 5336 bytes
font_01_sfnt_off00007535.bin
38f7aa6855596c7547d9733d24ef4b8a17e228510400b3fed12cc7385c9ece1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7535 9988 bytes

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