Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2552d7c9dbeae0…

MALICIOUS

PDF

49.6 KB Created: 2020-08-03 20:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee3911efc1b8329ea304b89f6e9cf34 SHA-1: 095e55d4ace417a8c7a246b1883fab8b62113400 SHA-256: 5e2552d7c9dbeae0567ea09582a6b88e1a078446af14ea4c9e7cdca297f3199a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, suggesting a phishing or scam 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.cc/pify?keyword=auxiliares+del+comercio+pdf
    • http://files.klbavarianwaxart.com/uploads/1/3/1/3/131379382/felasokodub.pdf
    • http://files.ciaowireless.com/uploads/1/3/1/4/131438419/wedixodojetakikewefu.pdf
    • http://files.jaymeliardi.com/uploads/1/3/0/8/130814254/xifusenurerexuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/41244656702.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/numozetofisevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/17941086160.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/73729678056.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/larson_algebra_2_texas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/60214264729.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/wells_fargo_save_as_you_go.pdf
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/18707278322.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/kulakedutil.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/46664091898.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/fajuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/weather_in_buffalo_wy.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/tumatajitotaxarotirap.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008449.bin
29615b53d71648541be4acb38c8090532c08d34db33e4bf7949fcb6b4e6923c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8449 5360 bytes
font_01_sfnt_off00009670.bin
9b712ffe32ba985f0bd903ea3cef6152d99c70d193f4dc7d63c7291b9e6a0995
pdf-font-stream PDF embedded font (sfnt) at offset 0x9670 10776 bytes