Malicious PDF — malware analysis report

Static analysis result for SHA-256 68840b72cc4f3818…

MALICIOUS

PDF

68.0 KB Created: 2020-08-08 16:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3015588a5a5ca6b77677b4f9e76c24c2 SHA-1: bd85b48c1452ae108f36e2df2e4b85519a9c0cf3 SHA-256: 68840b72cc4f3818b1a3b001e46e76800dc394a5dfc28d63133ffa82d0051c37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of a link farm suggests an attempt to distribute malicious content or SEO manipulation, likely leading to a phishing or malware download site.

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.cc/pify?keyword=arabic+numerals+chart+pdf
    • http://files.wvncrails.org/uploads/1/3/1/0/131070196/1eba6d4.pdf
    • http://files.countytownsingers.com/uploads/1/3/2/3/132303382/tapupowobatugel-getizumubakesuw-vofitisugo-putivuxaw.pdf
    • http://lafunit.fcallegro.com/uploads/1/3/0/7/130776445/10b33aecc7853.pdf
    • http://files.balancepilatesandmassage.com/uploads/1/3/0/7/130738681/7602582.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0692/6754/files/38990045853.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/bayesian_data_analysis_third_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/13920506424.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/1983_honda_shadow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/zidazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/lifexuwedupobunewetitifax.pdf
    • https://cdn.shopify.com/s/files/1/0434/5492/2902/files/kexijaxaleduxubiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/wuwukorigiwiguwelusitopet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/binuwojuzav.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/kunekijeripudabupudapofob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/catalogo_boxito_2020.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/marketing_business_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/29922482820.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f43.bin
4d61426e5c6d56fa71315253aef6a5eff3392e5b7b6001ea1d248e2d8392a252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F43 5296 bytes
font_01_sfnt_off0000b106.bin
0d12b678841786b0a4154860adb6d0f52e28254e80d725e2da162bb72cdfaf78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB106 10620 bytes
font_02_sfnt_off0000d46f.bin
81a22de07cd66f8d10a528581488ca5f4d03f50d77fb87c3e3f5a7065121429d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD46F 19440 bytes
font_03_sfnt_off0000f4b2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 4324 bytes

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