Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c1163a16e80f1f…

MALICIOUS

PDF

42.9 KB Created: 2020-07-30 02:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d38c0120957d4f952a2de759ec90124c SHA-1: dabf08efd8301fe729159e9b1d2d2b59182cc7d2 SHA-256: 58c1163a16e80f1fa6100df915136fd7e013cdc4a770bf728026725fc1147e79
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Assurance automobile maroc pdf'. The presence of many external PDF links, including those hosted on Shopify, points towards a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=assurance+automobile+maroc+pdf
    • http://files.swedesteelworks.com/uploads/1/3/0/8/130813768/zexomevog.pdf
    • http://files.brinmurray.com/uploads/1/3/0/8/130813834/wazuzipivukog_vonukokujemawe_pumirasikejibob_tanini.pdf
    • http://files.uscgminf.com/uploads/1/3/0/9/130969220/e486adaa.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4/131409170/3066792.pdf
    • http://files.barrons-conferences.com/uploads/1/3/1/4
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/tizorurodafewiruwisad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/54341321224.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/11903710978.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/78422375507.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/vitixopenopoxev.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/39487242290.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/bewirifesibalekojitap.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/pewajebeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/3615/5809/files/26514986298.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/wonizuzesezijimapuxovawiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/55097369148.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/79963167184.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a55.bin
ac0ebc04e9f18471a3d5354cbc4fe35e85ea9247cc5e21d64c836dd704fedddf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 5312 bytes
font_01_sfnt_off00007c39.bin
7632f4218f2f686a6a6517e82acaf3232d584894183dce862b0dcd2f7b614dc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C39 10148 bytes