Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3e723bfd89f238…

MALICIOUS

PDF

56.1 KB Created: 2020-07-30 18:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b59ac159168336a672214f9dd56cb40f SHA-1: 9c3a0aed9cdea0eeef2934957151042951676812 SHA-256: 0f3e723bfd89f238a3cad8e3669d1aefe0bc9e82572e67941fe59f6587e596a3
154 Risk Score

Malware Insights

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

The PDF contains a link farm and redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. The embedded URLs and the heuristic firings strongly suggest the document is designed to lead users to malicious content. No scripts were extracted from this sample, but the PDF structure itself is used to host and link to external malicious resources.

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=business+plan+template+free+pdf
    • http://files.schrockhampshires.com/uploads/1/3/1/3/131383619/9115616.pdf
    • http://files.premiergymacademy.com/uploads/1/3/1/0/131070872/542ab2.pdf
    • http://files.mrlomasenglish.com/uploads/1/3/2/7/132740836/3b93aeeb.pdf
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdf
    • http://files.citylabsusa.com/uploads/1/3/1/3/131381112/9130506.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/40141030779.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/68163755378.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/sibamozebokumemebulugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/62201833028.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/rikodimagapavakux.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0406/files/tabefogubusenuxaboz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/ganixizolopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0736/7592/files/galovimanapudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/35936776701.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/66854670227.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/vadatelugikijajever.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_off00009f62.bin
9ef0628f2dafcd541c26d7e120a3950034ed7c1f9e9bfc4948a92221c32ca1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F62 5008 bytes
font_01_sfnt_off0000b044.bin
ab7ee345e3b3059c87f1245d502fd6c96e8055e1abe38f6076410967e0361635		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB044 10212 bytes

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