Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdd2d957f4bf9e8…

MALICIOUS

PDF

47.0 KB Created: 2020-08-24 23:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e77cabb80c0325337064f847c08ceba SHA-1: 748526578e5a7e6b85c3931a04e66c543cbb85d6 SHA-256: dbdd2d957f4bf9e8ce2a75304a7e9b437cc3363dd8414571f17599fdc55c88e4
152 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into clicking on further malicious links. The document body, though heavily obfuscated, contains text related to 'free campaign flyer template word' and numerous embedded URLs, many of which point to Shopify domains hosting PDF files. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, directing users to malicious infrastructure under the guise of providing a useful template.

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=free+campaign+flyer+template+word
    • http://jerujozul.aayfitnessandyogabyjamie-dee.com/uploads/1/3/0/7/130738732/lusojuwigadi-kidexagebi.pdf
    • http://files.chronicallybeautifullife.com/uploads/1/3/1/6/131606201/giloxu.pdf
    • http://nijijazaw.erinmerryn.net/uploads/1/3/0/9/130969336/kebajilabur.pdf
    • http://files.ebdoproperties.com/uploads/1/3/1/3/131381540/wigomibejawaturawo.pdf
    • http://files.pcmusicinstruction.com/uploads/1/3/1/6/131637555/lekepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/mukulumetexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/26398734433.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/bhakti_sagar_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/36455980974.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/46999438494.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/pujepa.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/va_form_10-_7959c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/nuvunegudenumevoninarinud.pdf
    • https://cdn.shopify.com/s/files/1/0451/5204/3162/files/27102087055.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4678/files/excelsior_college_exam_content_guides.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/12485610659.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000791e.bin
9b20756281231f7f181b632f29991f15c61580b12b83e1973c165599cc244ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 5444 bytes
font_01_sfnt_off00008ba2.bin
dd9e4501a789f447182010c2c8ccce819562fb40ef2eb9a2be83622f297ab02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA2 10400 bytes

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