Malicious PDF — malware analysis report

Static analysis result for SHA-256 600eaa277e57eaba…

MALICIOUS

PDF

40.2 KB Created: 2020-09-19 10:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 24ad8179ca594c29a994ea98988fd12b SHA-1: 9347385e55101c709b6b28993728a044e9da7993 SHA-256: 600eaa277e57eaba95955e454545f4e5295fbdb3eaba44823e64fbd30c3ce982
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a 'PDF link farm' and another flagging a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body itself appears to be obfuscated or corrupted, but the presence of URLs suggests an attempt to lure users to external, potentially malicious, 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.me/wix?keyword=olivetti+portable+manual+typewriter In PDF document text
    • http://files.not4cell.com/uploads/1/3/0/8/130874655/vavorupiloje.pdfIn PDF document text
    • http://jijujafor.northwestclassiclabs.com/uploads/1/3/1/8/131858530/gefuborexe_dapanigajasul_kiwiradavotafa_garatosezukudun.pdfIn PDF document text
    • http://feviv.sanrafaelheritage.org/uploads/1/3/1/4/131408502/bejizodox-lepeposiki.pdfIn PDF document text
    • http://files.kerufeng.com/uploads/1/3/2/3/132303151/2278718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/kawijejutenojexefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/birds_of_prey_tv_series_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/68922861834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/92743857161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/human_development_report_2016_central_african_republic.pdfIn PDF document text
    • https://3ba2379e-4967-47cc-b034-12f31954046b.filesusr.com/ugd/98e298_5da732b959054960b3b5d0138e785099.pdf?index=trueIn PDF document text
    • https://928253cd-605d-4798-8235-3bc3c8765705.filesusr.com/ugd/7b00a0_024e1882c28543999e35cd0aa8ed2d7c.pdf?index=trueIn PDF document text
    • https://bafe3ac6-1f06-4c09-ba86-c1de3738ddde.filesusr.com/ugd/fb83f1_5221c23d2b25442bb8d52971dfc463c9.pdf?index=trueIn PDF document text
    • https://91b16e64-9657-40f0-b941-7781c7b965fe.filesusr.com/ugd/cf79db_571ef582c0a2486f9cb270d6eb7c2c4a.pdf?index=trueIn PDF document text
    • https://844d11f2-6d0b-417f-bf04-207db384e892.filesusr.com/ugd/7603ae_8cb0839ed931406d865ba35a3c64049e.pdf?index=trueIn PDF document text
    • https://de86da57-2a5f-429d-a7da-1bc3256a3f70.filesusr.com/ugd/cc15ef_b9ad2d1409ed4ecab834b18d75d74fbf.pdf?index=trueIn PDF document text
    • https://faf3fa83-fbe6-4bab-acfc-2d22774ffa55.filesusr.com/ugd/97368a_a8a1a0e48ce24c2883c5d598dd65a8dc.pdf?index=trueIn PDF document text
    • https://fcd79771-401d-4a10-a0f1-a18553d590bd.filesusr.com/ugd/2994dd_76d37e63c067489fb5484b67e9e9a232.pdf?index=trueIn PDF document text
    • https://8a76b39f-86d0-4d4f-968b-159b486ec089.filesusr.com/ugd/e4d7df_9615c87988bb46918343c7a3002d8081.pdf?index=trueIn PDF document text
    • https://961a71e6-ed69-4f00-b201-f602d58284f3.filesusr.com/ugd/d954c5_8c37ed00c4fd43f4a5538efc91698230.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 5208 bytes
SHA-256: ccf1a0b543f8acb7914072d7bc79e88f5c19e9a6817af35c3beeddda29867bb7
font_01_sfnt_off000070d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D6 10188 bytes
SHA-256: faa0ea8eb6c2b9cce1450856d8a200b768ff838d31923a172d7557cc98b152de

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