Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed54cfc5793bddb…

MALICIOUS

PDF

54.8 KB Created: 2020-08-30 02:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0af2182a5382bd11e0353b9f4cced93 SHA-1: 3f1887e3ad8f11278c000cf75331f741031dc728 SHA-256: 0ed54cfc5793bddbcc420840017a9e23444133a5d0e1f5e43795896ca5836a2e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'SE_MFA_LURE' suggests the intent is to harvest credentials or abuse multi-factor authentication. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.com/wix?keyword=what+did+the+caveman+actor+use+to+ke
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0464/5352/2600/files/chennai_express_full_movie_shahrukh_khan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/best_ad_free_reader_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/what_is_economic_profit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/viredomapeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/lokudixuwisijuzedefesi.pdf
    • https://cdn.shopify.com/s/files/1/0448/1646/6082/files/lakenasakusebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9780/files/gekade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/melinidekomesagor.pdf
    • https://cdn.shopify.com/s/files/1/0438/6983/1323/files/charity_foundation_wordpress_theme_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/64287202083.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/lagu_lp_bleed_it_out.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ce0d02bfa7b458f835fcdb7f067e073.pdf
    • https://static.usrfiles.com/ugd/f4de5e_32bad37c70044b33b1729327af9407d5.pdf
    • https://static.usrfiles.com/ugd/1849a1_16da51e6bbde40ab900067cad6caeaa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3085020aa0f5482d9b86b8fde5c99ee7.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_be6387e784dc413884cd57fd46bb5dd7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008726.bin
4910e20ae1e09d9ea8dab773e29a51849ef4928c52900b66d0f366b0085a2041		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8726 5168 bytes
font_01_sfnt_off00009892.bin
9643e95214275007366ac7c9c9aa10e7224602c6bc9946d7fd351517c0b66006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9892 11184 bytes
font_02_sfnt_off0000be91.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE91 4324 bytes

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