Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e7188212a726a1…

MALICIOUS

PDF

38.4 KB Created: 2020-08-31 09:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40cd68e92cacbc0c603a6b0cd206e412 SHA-1: 53266aae9a7941053a1fd5087c5582897ec29c91 SHA-256: 66e7188212a726a15d87335a0ceb4288eacb2998bb6bf565090a9bd60f5d40f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, suggesting an attempt to lead users to malicious content. Additionally, it functions as a link farm, hosting numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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/wix?keyword=lettre+a+un+notaire
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/11019566276.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/65616876317.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/arby_s_online_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/93986756628.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/zevejifo.pdf
    • https://static.usrfiles.com/ugd/b8c837_007c84f8449f45b1aed9b09d4a4f3800.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb6a9758c2f04997957071f5dc67302f.pdf
    • https://static.usrfiles.com/ugd/b8c837_eea862f89f4e476b905f8d61a6bb3ff7.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/bishop_california_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/mabofevezulovewatezukap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/15545090236.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/72105775152.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/89934118315.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_off000057c0.bin
534c8e5b8c2d2660889f9162b06dfc6ed5de4977ab408529a230ee468a6463ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 4412 bytes
font_01_sfnt_off000066c7.bin
f121714550b0229fabcb0b8eabb28ef80ca92fbf1297a70f69946a587158df2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C7 11560 bytes