Malicious PDF — malware analysis report

Static analysis result for SHA-256 100356c70366b700…

MALICIOUS

PDF

47.7 KB Created: 2020-07-27 04:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c66851f1cac621474f55ef03b55fab94 SHA-1: 8627d1e16968d5f5a7e182e9eedc21fd1e114249 SHA-256: 100356c70366b7003f04d3bc95613e291e71747cf3046f0e30892f0db72a72b1
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=the+malcolm+baldrige+criteria+for+performance+excellence', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector suggest an attempt to lure users to harmful content or manipulate search engine rankings.

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.ru/pify?keyword=the+malcolm+baldrige+criteria+for+performance+excellence
    • http://files.connect2compass.com/uploads/1/3/1/4/131438718/9425754.pdf
    • http://files.ecautoelectric.com/uploads/1/3/1/4/131437005/sizedivorolapasa.pdf
    • http://files.trimaccompanies.com/uploads/1/3/1/4/131437330/zafadewatunuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/bopefuwobirimuxor.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/gipenulafibewagun.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/89673780583.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/xavuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/93292205929.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64831632673.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15900382268.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/63218820377.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/81393722399.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/59065777879.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.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_off00007c2e.bin
ce52323477afda8384e57bb11f65c66109577a1f0330760b718f7f31f786ca47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 5336 bytes
font_01_sfnt_off00008e23.bin
e39e4d9ce2cb3b163c279164b778806f4584df7f965ad43bc61b02fc861b3c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E23 10264 bytes

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