Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b133b8c1f4148f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 12:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c711f2525c6dbaa591b29f03589c826e SHA-1: 25c49c7334b23e8c2d75495e3e51284b2aab7f11 SHA-256: 20b133b8c1f4148f8329d22252900809f23de34e3e6a600d5a20afd83a445179
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or contains obfuscated text, but the presence of the malicious redirector and the link farm strategy suggest an attempt to lure users to potentially harmful content.

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=ecole+ingenieur+informatique+alternance+nantes
    • http://files.cooperscrossroad.com/uploads/1/3/1/3/131383456/zilejidofukonez.pdf
    • http://files.lamsgolflinks.com/uploads/1/3/0/8/130814101/8299359.pdf
    • http://files.thewanderingbays.com/uploads/1/3/2/6/132682974/sawebivexugo.pdf
    • http://bupexa.renfestjeweler.com/uploads/1/3/2/7/132710776/vuxupunekexov-tupedoviwe.pdf
    • http://jirid.jordangirardin.com/uploads/1/3/1/3/131383332/bakapagulijexa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/fupexizamiduvaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/vepakujisozuvovisilurax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/42280140902.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/jokitapidazolimolivigiren.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/76503493887.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/tekuxizadosiwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/43627027860.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/90374548914.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/nelerovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/36033754747.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2870/7485/files/hemophilia_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/beowulf_old_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/76969081302.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_off00006948.bin
99df70fa315ac54a5dbc48c2997b0d81c2a14956981621c224911e83681da830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6948 5284 bytes
font_01_sfnt_off00007b2a.bin
3a0ffd470e72ac8f4d527fa69b36d932d7d3b70dc4ea30829c7e07ccba49b8b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 12012 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.