Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a86fc47e94b80d8…

MALICIOUS

PDF

44.9 KB Created: 2020-08-20 04:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f3936f263e616a96d8b431c667ee9c4 SHA-1: 0bd3389a3e927cb9962d99d61217e0cc1308790c SHA-256: 5a86fc47e94b80d8c442571ce345015ba4df3e859e6ad75a02456f99e82bfb41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to known malicious infrastructure, suggesting an attempt to lead users to a malicious site. The document body, though heavily corrupted, contains text related to 'Volkswagen owners manual pdf' and the malicious URL, indicating a lure.

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=volkswagen+owners+manual+pdf
    • http://files.johndinser.com/uploads/1/3/1/3/131378950/wupavu_kodunol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/camera_scanner_to_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/xesuvoguzuwaxiso.pdf
    • https://cdn.shopify.com/s/files/1/0438/2860/9186/files/ethical_hacking_books_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/calendario_2020_argentina_con_semanas.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/bunkering_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/jixejapemojurifupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/89019159625.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/suite_bergamasque_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/dizobonexisepudateregaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/633632545.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3031/files/80054779933.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/3gp_mobile_movie_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/kifuvijiduzuwufugofatajux.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/kisusokifewibudufuborabop.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f7.bin
4baf244c9f2675e76b8decae486f993bab656992a3cc10a6c1aef9cb15b063dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 5236 bytes
font_01_sfnt_off000075bb.bin
24b4f15202d898e0e0ba7fb5d5851b7c128b8589b6b4b3149d5683fa66b23880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BB 10272 bytes
font_02_sfnt_off000098cf.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CF 4324 bytes

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