Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c25e7311f624b9…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 22:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb306c07731f18cd1ba5bf45623b0e98 SHA-1: 5a22b18ea3392017d5d4d4ef32399a864a58e7b2 SHA-256: c8c25e7311f624b986efa908e075ee25af6fa254c08b6170afe6afc50ea9898b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, indicating a phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the ttraff.com redirector URL, which is likely used to funnel users to 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.com/pify?keyword=penyebab+alkalosis+respiratorik+pdf
    • http://files.midcoastconsult.com/uploads/1/3/1/0/131069763/rewanuxixozo.pdf
    • http://files.leeplazashopping.com/uploads/1/3/2/8/132814465/fimozufajajawi-jilelo.pdf
    • http://vugopepo.steveedwardssolo.com/uploads/1/3/0/8/130814328/6817038.pdf
    • http://files.celestecorp.com/uploads/1/3/0/7/130775471/4716015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/xigetesowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9583/5295/files/68372876905.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/74009071802.pdf
    • https://cdn.shopify.com/s/files/1/0437/5307/8933/files/26611260507.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/73075523742.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/league_of_legends_pbe_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/mugexetubovotalipopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/89797564401.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/nazipojunoxisoxaxevabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/pobedawikasobulaw.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066c7.bin
bc3b071c632a5ff2a8c856f9f215539b54d72c35f0a3cc8c21ef9ae65c446717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C7 5132 bytes
font_01_sfnt_off0000783e.bin
53b6056ed0684036d4d4054c6f7d0897ad45785181ca11d26c7cf6d510fe673c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 9856 bytes
font_02_sfnt_off000099ee.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99EE 4324 bytes

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