Malicious PDF — malware analysis report

Static analysis result for SHA-256 192265ad335df2f1…

MALICIOUS

PDF

48.1 KB Created: 2020-08-23 23:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e88a91c71b36662ac963ba97b5b2b82 SHA-1: c544b5bf84d8a8a05bc38e96dbe4080cd481d581 SHA-256: 192265ad335df2f19f58f926e83d90a6f5bd7845c068deea67cfc6fe28bea5d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'attaching plastic sheeting to wood' and a URL that appears to be part of a link farm. This suggests the document's primary purpose is to redirect users to malicious sites, potentially for phishing or malware delivery.

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.ru/pify?keyword=attaching+plastic+sheeting+to+wood
    • http://wuzum.worcesterpflag.org/uploads/1/3/1/8/131857114/ruzemekapaj.pdf
    • http://jidereje.oberlinsfc.com/uploads/1/3/0/7/130738524/54bcd6b58b.pdf
    • http://files.stutheostrich.com/uploads/1/3/0/7/130775980/nizuv_sewekulod_gubuneb.pdf
    • http://zoguleto.josephhudson.com/uploads/1/3/1/3/131380930/2fce788694dac20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/68818761120.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60868594071.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/89206093308.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/58735382952.pdf
    • https://cdn.shopify.com/s/files/1/0459/9237/8527/files/50176549773.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/pinibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/94371700112.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/30952112311.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/36373233474.pdf
    • https://cdn.shopify.com/s/files/1/0459/9601/5773/files/vugiforulovox.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/limotanozuromifuxedaxovor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fbc.bin
c3bb3ac4ca8329392f573c2396f95554942497317c98d4377fac38fde1e8ffae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBC 5108 bytes
font_01_sfnt_off0000811c.bin
b9f09b14597c391e1fd90444d62089b3c5e9de7e10126e52e89ae0831ab8c554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 10488 bytes
font_02_sfnt_off0000a4f0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F0 4324 bytes

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