Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb937d1eb0de488…

MALICIOUS

PDF

67.1 KB Created: 2020-08-04 09:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f1ea8f09adde54158772842cb2e70e SHA-1: e98ea32b24927f38c6fdca8f580e0cfa7a5a0b3e SHA-256: 1eb937d1eb0de488e02e3c750054ccf6eb0d9405012a35220e3567fc1ebee5c4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a tutorial, suggesting a social engineering tactic. The presence of a link farm indicates an attempt to distribute malicious content broadly.

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=tutorial+belajar+java+pdf
    • http://files.mastconsultancy.com/uploads/1/3/0/9/130969480/cac5169ee7.pdf
    • http://files.michellejohnsonhowell.com/uploads/1/3/0/7/130775242/2b3a4.pdf
    • http://files.johnnyaircargopadala.com/uploads/1/3/1/8/131856949/xaxezefozesepos-libuxanowes-divuwelotekedup.pdf
    • http://naluvu.thornhillhousesra.com/uploads/1/3/1/1/131164243/konokepoxowaka-gonuvifan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/xekosipuzuzafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5311/files/87900440449.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/occupational_health_and_safety_green_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/6420/4193/files/67984892179.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/gumasiniporak.pdf
    • https://cdn.shopify.com/s/files/1/0428/4783/0183/files/75073204669.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/gimujijonuzexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/monsters_by_cr_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/31166976085.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e57.bin
5ff50c84f038deebf0833a0ea1f813b74a7e7b806d231221ea6b673f06bece94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 18024 bytes
font_01_sfnt_off0000a793.bin
793d11d115962d435af0ddaccbefa341ac1eb867be0eaded5be7e1c744db55c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA793 5080 bytes
font_02_sfnt_off0000b8f1.bin
fff8b0e959f82d2f93011181e4d223e704da5f50faf4d31b951e0cac30baa52a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F1 15496 bytes
font_03_sfnt_off0000e9ee.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 16036 bytes

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