Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2d284408724119…

MALICIOUS

PDF

62.8 KB Created: 2020-08-08 16:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23a2d511589e4f549d0f60a54763c3f0 SHA-1: 220c281dd16496a39688d441426dd802bc290203 SHA-256: 0f2d284408724119da694cbe59089508fd0bb48edfa2a0adf98cb755eacf3b75
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One of the primary links redirects through known malicious infrastructure at 'ttraff.cc'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=aerofoil+design+pdf
    • http://files.lilyandjoantheatre.com/uploads/1/3/1/6/131607053/nosanilixefit-wezajadu-giguwenurat.pdf
    • http://files.crystal-river-healing.com/uploads/1/3/0/8/130813982/9a877e15c77612.pdf
    • http://files.artattoo.co.uk/uploads/1/3/0/8/130874192/1480258.pdf
    • http://kujamag.jamiekincaid.com/uploads/1/3/1/6/131606289/9159061.pdf
    • http://pagegunuj.joyfulbrush.com/uploads/1/3/0/9/130969465/ruxite.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4418/1928/files/pebemolepis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/54930740413.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/free_software_to_reorder_pages.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/bdo_roaring_magical_armor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/advanced_engineering_mathematics_by_erwin_kreyszig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/dell_brocade_6505_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/atmosfera_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/62337309369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/auto_mechanics_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/what_is_discord.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/separosawogarum.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/66931862922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095f2.bin
27b077b769a422a93ae4159fe331edc407bd3af0ea0adaf391e12d51d643f214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F2 4988 bytes
font_01_sfnt_off0000a6ff.bin
d6ac1741b3510d9016396d4da91dffc2374a2a347e1e4a49e95d89856fb43c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FF 15744 bytes
font_02_sfnt_off0000d95a.bin
a12e1470c7ae925daad548a12934703a3a60fb09a822252cc73ba90359afbd61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 16064 bytes

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