Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5298e0347bc4267…

MALICIOUS

PDF

58.1 KB Created: 2020-08-20 02:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e170d94b166a15ef20acfe3d22e689c8 SHA-1: 9db97b625eacacf7d2dbe41bd800211f6f6b5a34 SHA-256: b5298e0347bc42675db8a8dd8f221290fa5064e221ff0440e6192566229f3d26
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.com/pify?keyword=sad+shayari+wallpaper++free+hd' is likely the initial lure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=sad+shayari+wallpaper++free+hd
    • http://files.shaunyates.com/uploads/1/3/2/3/132303320/08945814c7489.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/sutisepubiguzujitum.pdf
    • https://cdn.shopify.com/s/files/1/0435/8569/9997/files/how_to_facebook_videos_without_application.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/arsenal_vs_chelsea_highlights_today.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/vtech_dect_6._0_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/18415231740.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/blender_models_for.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/palutekuxitadoxav.pdf
    • https://cdn.shopify.com/s/files/1/0441/1280/6040/files/sojakijogetepexedupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/86329278146.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/13190518160.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000595f.bin
665e029a8474f48cb7f39e1f87a839ddc4f44ab53fb1d54e6773be66aca14acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595F 5428 bytes
font_01_sfnt_off00006be1.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 3720 bytes
font_02_sfnt_off0000773b.bin
0a046cf7333bf656def2807a2a39f730af52d8747d1423ac44dbb8f51f2338c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773B 3960 bytes
font_03_sfnt_off0000852a.bin
b1c97f91e52de1d899f2ff7d67d0ee81eddd1d89748760e0efe0492e9d7fb15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 9984 bytes
font_04_sfnt_off0000a7a1.bin
6f64c23e4c59249dced8fdb30ce2b80ef420d1d292b5414ff0ececfa09d76ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A1 16860 bytes
font_05_sfnt_off0000beee.bin
e07c3c39bed7beeb42f6401bf0603d9ce02f71f5154251b20f6ace1e604ef041		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEE 5444 bytes
font_06_sfnt_off0000d26d.bin
551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD26D 1736 bytes

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