Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be33791375611ee…

MALICIOUS

PDF

37.4 KB Created: 2020-08-24 07:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c923d0b05631f52f18dea511ace755d SHA-1: ce57b133e00e9c3f328465ecc7911395fdaf7645 SHA-256: 7be33791375611ee0dff95580fe00c24b57148f5e5c8860a243824c947c88bd6
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=anaconda+2+video'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to drive traffic to potentially harmful sites.

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.com/pify?keyword=anaconda+2+video
    • http://wogovedi.royalorderkingdomofpoland.org/uploads/1/3/1/4/131407406/675540.pdf
    • http://gidano.lifethoughtspublishing.com/uploads/1/3/1/4/131406427/8613947.pdf
    • http://files.thorinrealestategroup.com/uploads/1/3/1/6/131607565/25e836af2.pdf
    • http://zasez.newmarketcrossfit.com/uploads/1/3/1/4/131406676/rekuta.pdf
    • http://files.cutbylight.com/uploads/1/3/1/6/131637307/1317522.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/29073407955.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/wawirafor.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/19590627774.pdf
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/1_4_inch_sheetrock_ceiling.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/59934602124.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/sezasivelotefiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4833/6536/files/97114566184.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/xepurutikivosutan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/11481930914.pdf
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/7937451857.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/bwv_1006a_prelude_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0435/3638/4149/files/17931613974.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/pitapenabapilur.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054c0.bin
7f57900e8483905f45646aa2255fc707fe6e454ff22cc3aa5154b00acfff6431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C0 4808 bytes
font_01_sfnt_off00006527.bin
3acf21e2a287c7286b49c0fa771ae9a51dc2557d76836231a09657c106f076c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 10524 bytes

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