Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bef435008e3a8db…

MALICIOUS

PDF

51.5 KB Created: 2020-07-31 04:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e09d047d54bfec101c47a14c53a46c5 SHA-1: b34898981046766bd25c4f2464fed0f2c66001b5 SHA-256: 0bef435008e3a8db5663cdb8ee060dd8f7be3ce2ac0604458cd58be4449782a0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits a PDF link farm, suggesting an attempt to manipulate search engine results or drive traffic to malicious sites. While no scripts were extracted, the embedded URLs and the nature of the link farm indicate a malicious intent to redirect users to potentially harmful content.

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=aggregate+planning+in+supply+chain+management+pdf
    • http://files.greenacrescanoe.com/uploads/1/3/1/3/131380175/20aa5.pdf
    • http://files.mpala.net/uploads/1/3/0/8/130813860/92aae5623.pdf
    • http://files.elemenoenglish.com/uploads/1/3/0/8/130813135/4855768.pdf
    • http://files.valeriesplayhouse.com/uploads/1/3/1/6/131607163/tuludiwa-dakizawilosoji-vasudaxoli.pdf
    • http://files.thebotanicalbrownie.com/uploads/1/3/0/8/130874566/34cffcf0d1a61e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/zunupim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/muditej.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/4976032857.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/67230592143.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/7244589197.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/kuwakiraz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/mariwebazubelezorozib.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/84899141506.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/lojodeja.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/8032887256.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/87296002588.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/94104373470.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/dopele.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_off00008a27.bin
106406e05a2e5433ed5f88eba7a8eabbc55abd6752fd5784eb22430cc38c41bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A27 5432 bytes
font_01_sfnt_off00009c7a.bin
76b596d2ad245904457bed73c7686afaee92e4ff3e2a7d0678f02317cf75dc1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7A 10392 bytes

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