Malicious PDF — malware analysis report

Static analysis result for SHA-256 0527bd361bd88c4d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-14 14:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb70bd150a05203ff3e289743171aef SHA-1: ab2634b6aabd556234dab8f1c65e12e333486ae1 SHA-256: 0527bd361bd88c4deb0502113c2717d3160656546009371497157f5d8ff79ae7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.com/pify?keyword=android+versions+distribution+statistics', is identified as a known malicious redirector, indicating an attempt to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=android+versions+distribution+statistics
    • http://wilom.smwa-cloudcroft.com/uploads/1/3/1/4/131453133/e30f8e18f3b.pdf
    • http://sipafu.antiaginguniversity.net/uploads/1/3/1/0/131070450/wodol.pdf
    • http://files.carrolltonpd.net/uploads/1/3/1/4/131437655/xivimexogaxavi-vupojiboke-xanojanorizop.pdf
    • http://muberurar.bankstowntheatrecompany.com/uploads/1/3/1/4/131407668/7362ef0496e23.pdf
    • http://files.boostfitness.co.uk/uploads/1/3/1/4/131453984/gobovasubojolijaja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/wugovupidabelebaragama.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/63018002895.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/200616354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/28433551585.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0429/9787/4851/files/the_walking_dead_comic_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7207/files/muxizinapitijex.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/56417044685.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/56284575788.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/56884895813.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/wasobora.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/frost_relic_risk_of_rain_2.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_off00007001.bin
ef689ec099b97cab1e4993eb55672e646c0412968bb389e08f33f78d1145c2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7001 5088 bytes
font_01_sfnt_off00008159.bin
1cf2371aa4c0a2e14e4d021df09d53e74d746b83a9afb286595dc32e75fc2de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 10204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.