Malicious PDF — malware analysis report

Static analysis result for SHA-256 180d9c8f461ae772…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 06:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa4e07df91a63707a3af6aa3274a1ed6 SHA-1: a0fef3051bbb8ad262b2178d02d862693f69fc2d SHA-256: 180d9c8f461ae7725d0930bacdc7f0c502c19b6484a444c6efafe2481f71a026
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/pify?keyword=ticking+bed+sheets
    • http://files.winelovingfoodie.com/uploads/1/3/1/3/131381542/lujinarekuxewi_teduzofofeseje_vitenuxigerig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64630415929.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/eclipse_java_ee_ide_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/40852707165.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/americanah_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/curl_example_post.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/gefafisadiwakerum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/tuberewidoxofukizizesoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/jofugufaxubisudikuxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/83656553473.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/benim_hocam_matematik_tyt.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/94534324895.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/
    • https://cdn.shopify.com/s/files/1/0429
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617f.bin
bdccefe14f36b3f6029a2cf02f5dea8375c009e50bbdb7d00ef82aeaab0e9215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 5016 bytes
font_01_sfnt_off00007289.bin
7695093e1202b965897ca532351dc8fb60cada4a7b8861d8e65e523c2e45b33f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7289 10324 bytes

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