Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab6ec071ff61c1d…

MALICIOUS

PDF

44.5 KB Created: 2020-07-31 12:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d39757ffa3dee27db1111846f33ea5 SHA-1: a1919332bb37cc79af408895d4931093cbfde8e5 SHA-256: cab6ec071ff61c1d7a7e2719040b72ee7bab9828ad2700c67d8f9f824b05fa14
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'carte calanques pdf'. The presence of numerous external links, including to Shopify domains, suggests a link farm or redirection strategy to obscure the ultimate malicious destination.

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=carte+calanques+pdf
    • http://files.michellemounts.com/uploads/1/3/0/7/130740112/66d8391f88a.pdf
    • http://files.ilufinu.org/uploads/1/3/1/3/131380558/52eec93c.pdf
    • http://files.cuttingedgepetservices.com/uploads/1/3/2/7/132712234/32503e2e4259d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/32128260051.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/60511107509.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/17383916423.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/28058324690.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/14174414136.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/dujumapiforuvabipiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/xinidubotezuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/dudotomemoruputezaxibowal.pdf
    • https://cdn.shopify.com/s/files/1/0440/1460/0342/files/liwovulameri.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/76528727184.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/luxodapewova.pdf
    • https://cdn.shopify.com/s/files/1/0440/1460/0342/files/34715646644.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/1/0431/9

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f69.bin
816a1e747902126cdd038ebc8b1aadc5b438e16d92d7223ed7437ca86b28a3c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 5024 bytes
font_01_sfnt_off00008086.bin
821fd8ee6de724a6b67338e414119c8515afa2ef59b133fa3dd6d698734ceeff
pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 10640 bytes