Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae282d512ec435c2…

MALICIOUS

PDF

37.6 KB Created: 2020-08-26 19:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de45abe961a3f675883d7b282d51d7cb SHA-1: d444c085619a063ce516c5dd44e1a7d5e4fc4b73 SHA-256: ae282d512ec435c20d17abe52a3c9e25f135704d5f67b963ad97ebf5fc01833a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=u.+s.+news+world+report+best+hospita', is designed to redirect users to malicious content. The PDF also features a link farm heuristic, indicating a large number of external links, many hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly suggests a phishing or redirection attack.

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=u.+s.+news+world+report+best+hospita
    • http://files.yuwuvfx.com/uploads/1/3/1/4/131406440/5539358.pdf
    • http://files.theswiftreview.com/uploads/1/3/1/0/131069887/xuvaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5841/3216/files/ielts_general_speaking_practice_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/31163357956.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/aristofanes_lisstrata.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/mazup.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/64741169256.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/27483779991.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/vivodixoziwawoxoduputi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/cerita_anak_sholeh.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/54348769827.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/helping_verbs_list_with_marathi_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/64027492438.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/kenujanitur.pdf
    • https://cdn.shopify.com/s/files/1/0440/3239/3366/files/candela_studio_viewer.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_off000046e7.bin
63bd5decc30f41da9031bb3bc06921f3f7b617f97d591b28794d73ed8643216b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E7 5092 bytes
font_01_sfnt_off00005832.bin
6aa196827c5371471e0bfbe3aed8a8582cc01704a9ef18e41ddfda3ec6c0419d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5832 10532 bytes
font_02_sfnt_off00007b33.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B33 4324 bytes

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