Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d237d0bf16fc261…

MALICIOUS

PDF

45.3 KB Created: 2020-08-18 21:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33db957d6f1f367847c99b7345468835 SHA-1: 3c3dd89824fc2d385f6740830a828ffe603323ed SHA-256: 3d237d0bf16fc261ffad0044a5193c1b88dd6403dad481426f025a0e0dda4d35
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link disguised as a download for 'Chrome for mac os 10.5.8', which redirects to a malicious URL (https://ttraff.ru/pify?keyword=chrome+for+mac+os+10.+5.+8). This indicates a social engineering attack aimed at tricking users into visiting a potentially harmful site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt.

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=chrome+for+mac+os+10.+5.+8
    • http://files.marktech1.com/uploads/1/3/2/7/132740620/5012904.pdf
    • http://files.promanchesterdigitalmarketing.co.uk/uploads/1/3/2/8/132814050/venez_minowut_fiwivasofozu_tuzepikimuj.pdf
    • http://kulomis.sarahpatzphd.com/uploads/1/3/1/3/131383791/nojigegel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3458/2938/files/2851121953.pdf
    • https://cdn.shopify.com/s/files/1/0436/5333/3145/files/best_book_for_analytic_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/adding_and_subtracting_fractions_with_like_denominators_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/naxofaserewaboworofaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/94666332737.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/xekoril.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/75514623000.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/data_gathering_sheet_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/29567429607.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/79877078511.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/ninojitup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/juvupavavolenekawanepixo.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_off0000733e.bin
bf09a65d6531c5ba6f3307848d4e7b215c5fe4290e9d63ad11e32d6ee0fbcaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733E 5536 bytes
font_01_sfnt_off000085f4.bin
361cc73f8af06a38158e1f5df20261b283f1272766add26e65d65750284c042f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F4 9980 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.