Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fee603993f2e30…

MALICIOUS

PDF

35.1 KB Created: 2020-08-20 19:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c236e68a1d2d6af6688abfe6410056 SHA-1: 9f358f20f47abd4a2fefddfe20f95eca4daf74b4 SHA-256: 33fee603993f2e30427e85a0278187679e82df070563119ada58dab465723c61
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a phishing attempt related to financial accounts, specifically an 'Australian super account closure form'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious 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=australian+super+account+closure+form
    • http://bizitesa.tiffanyshocklee.com/uploads/1/3/0/7/130776795/a9a5200c.pdf
    • http://files.mensshedindooroopilly.com/uploads/1/3/1/8/131856827/narawaru_wumir_fonubonuxa.pdf
    • http://nuvunop.starlightdancecamps.com/uploads/1/3/0/7/130775726/e51ad864303a10c.pdf
    • http://files.braillenaturetrail.com/uploads/1/3/1/3/131381614/kiliwajumematal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/5261/1222/files/mejedoxalekojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/79591048120.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/67891625684.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/fable_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/accelerated_learning_techniques_brian_tracy.pdf
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/43617200153.pdf
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/31315176151.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/bilyoner_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/bawitubumabazasupadilivel.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_off00004102.bin
5412c24cb74d4797ad77bbc55e95ff0d6308b362cd3b510158968904959aebe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4102 5032 bytes
font_01_sfnt_off000051fd.bin
cb23c6a90d704e72e89125f4d49b3ecd4e4377516c7eee231fb72a20d76ad9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD 9244 bytes
font_02_sfnt_off0000719d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719D 4324 bytes

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