Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d509e7673a85d99…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 18:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bcd67c9125b24f2acb2071a74aef3b6 SHA-1: ca5ae195ab1bb8315a33e5b83e287e379b77ffeb SHA-256: 5d509e7673a85d997de17ad86630369dcf563c3ee103b55f76a7f5a2abbd7095
154 Risk Score

Malware Insights

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

This PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=feelings+and+emotions+chart+pdf`. The document body, though heavily obfuscated, also contains this URL, indicating its likely purpose is to redirect users to malicious content. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malware distribution 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=feelings+and+emotions+chart+pdf
    • http://ribasa.edmtool.com/uploads/1/3/1/4/131407222/bokepe.pdf
    • http://files.paraglidingtalk.com/uploads/1/3/2/7/132710779/gesefonazodevopejoti.pdf
    • http://jejevinir.unescoclubsph.org/uploads/1/3/1/4/131406799/xojiluj.pdf
    • http://files.blackicepress.com/uploads/1/3/1/0/131071067/dafut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/91556800648.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/diabetes_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8381/6359/files/5943966064.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/tojazus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/mifunuxugawuvitetuguz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/muzewumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/pedezutujolaxevopi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0868/6237/files/angels_in_america_tony_kushner_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/49680494812.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/statistical_methods_and_calculation_skills_4th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/hyakujitsu_no_bara.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_off00006be7.bin
6df67af698b4126a3ceef3d5016be0ff295e78536f617704c421b1155833909c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 5524 bytes
font_01_sfnt_off00007e89.bin
e2edff4ca91577146530392a7022518d5be811649e4dd7af35fce6a188feefd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 9724 bytes

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