Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a558299e1ac423f…

MALICIOUS

PDF

43.5 KB Created: 2020-07-10 11:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680cb01c2b8121f7e396d0ebe9ec2840 SHA-1: 932b4da75bfdf90d03fe326e9801675e941c1393 SHA-256: 6a558299e1ac423f04d80fac786013c012d48cbd896a52dfc9e52fc6fc799973
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains URLs that are likely part of a link farm designed to drive traffic to malicious sites. This behavior is consistent with SEO poisoning or phishing campaigns.

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/wb?keyword=foot%20and%20meter%20in%20poetry%20pdf
    • http://files.sachagrosselart.com/uploads/1/3/0/9/130969209/belizifimekedaxuwuzu.pdf
    • http://files.tennissukses.com/uploads/1/3/0/9/130969775/b574bb103f3951.pdf
    • http://files.neonopen.org/uploads/1/3/2/6/132682293/dc75c.pdf
    • http://files.emergingpaintinginvitational.com/uploads/1/3/1/4/131407035/3041218.pdf
    • http://files.healingneck.com/uploads/1/3/2/3/132303312/semejivabuzew_lefadowopidixe.pdf
    • http://files.marandihostetter.com/uploads/1/3/2/6/132680932/lowudubolado.pdf
    • http://files.sandrabekvalac.com/uploads/1/3/2/6/132682848/ed935e58d3f1.pdf
    • http://files.toris-pinkribbonjourney.co.uk/uploads/1/3/1/6/131636651/nupulunasolot_vewukumomogifes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tawufeje.files.wordpress.com/2020/06/15739746904.pdf
    • https://ditumofi.files.wordpress.com/2020/07/43438262274.pdf
    • https://dodifoji.files.wordpress.com/2020/06/pagukutol.pdf
    • https://mulovutizupi.files.wordpress.com/2020/07/mewawabalulinamosinirimew.pdf
    • https://pavumowe.files.wordpress.com/2020/07/11194966539.pdf
    • https://jisimefadew.files.wordpress.com/2020/07/24155802373.pdf
    • https://nojowijede.files.wordpress.com/2020/06/98337170305.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24810932871.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.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_off00006984.bin
d09b4ffe68541be4ff47c9b37fa0069f765cdfa7cb8b076786a0113d687775ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6984 4820 bytes
font_01_sfnt_off000079d1.bin
83619ff27f663123a5eff5a178b94548f8a11ca57ffe27ca9486cf96d0e12eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 11976 bytes

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