Malicious PDF — malware analysis report

Static analysis result for SHA-256 052a81c947de343d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 14:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eddab369c0e93a3f49836a7db018ffe2 SHA-1: 3878e349032a2e2682c0fd0a5387bcccd92ea148 SHA-256: 052a81c947de343d4b8376fe0ff3b0e6052199a4ec0508be3a79067d5b12b354
154 Risk Score

Malware Insights

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

The PDF file contains a deceptive document body and embeds a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the link, and PDF_SEO_LINK_FARM indicates a large number of outbound links, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly indicates maliciousness. The primary attack vector appears to be luring the user to click the malicious URL.

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=dispute+hard+inquiries+on+credit+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0841/7192/files/vigizunumeduta.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/14799129592.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/16145514801.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/xusupanuvugugusadakila.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/19743525978.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/mobufijanejimapamefozure.pdf
    • https://cdn.shopify.com/s/files/1/0435/4126/6587/files/a._c._market_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/magic_armour_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/puworebofisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/garmin_nuvi_44lm.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3652/files/guida_turistica_bolzano.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/4584189025.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/35986666839.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/65832025233.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_off000069cb.bin
66d3a77ca28491d3d1bfb930fc8fa0c55d67edfedc93038d4aa1f948760f5872
pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 5256 bytes
font_01_sfnt_off00007ba5.bin
77f37b432a26fdb43662cacc7c55cf16ad143f47e0eaf7a7ac41a9816b3568e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA5 9528 bytes