Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cb7945752de200…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 00:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db35e96702bddf5572502163b0e4d3c SHA-1: 2e48bb7eb815266718caf7dfaff89fd551ee9325 SHA-256: 05cb7945752de20087243e6d90c555099463f0edf44be6eb5b44d87e1634ec8c
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=tincion+de+wright+pasos', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites or manipulate SEO. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

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=tincion+de+wright+pasos
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/58859007944.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/kieselmann_butterfly_valves_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/9199581072.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/tunejogetexojedik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/vebomusibisutukabisafuzu.pdf
    • https://static.usrfiles.com/ugd/696b8a_1efca1258f4747a189fc81418c627d6a.pdf
    • https://static.usrfiles.com/ugd/764aaa_87a0e60b760a4a1e9926aad4ff8d4855.pdf
    • https://static.usrfiles.com/ugd/79e0dc_3289c272cb9a431eafb4d7d112d9005e.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/view_bing_maps_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/15011258411.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/47379456135.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3709/files/compact_oxford_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/87035722516.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/gastroparesis_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/5435/7910/files/99114368266.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/fugogokexud.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_off00006a5f.bin
0b5ecebdf35b42f76f0e2292dabab5bbb32529488d586ca62d6e4124765c4e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 5344 bytes
font_01_sfnt_off00007c8c.bin
f8b4f9f688b236f54603cf292fea4e89e63b69959be1064317bd2ca8f2afcee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 10252 bytes

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