Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc0c07e4b5212fe…

MALICIOUS

PDF

40.9 KB Created: 2020-08-24 18:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a171379a4ee961389624a54bf9e11571 SHA-1: 04a3691d74aa09013b3dd620b7de1e39b8e55678 SHA-256: 5bc0c07e4b5212fe87e8f6965b1db1b2531b80f71ca086441227822fd81dda5e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=cintiq+22hd+touch+manual, is likely used to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The ML classifier strongly supports the malicious verdict.

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=cintiq+22hd+touch+manual
    • http://files.crystalwands.net/uploads/1/3/0/9/130969151/naliniwukosexovu.pdf
    • http://vofab.risacromer.net/uploads/1/3/0/8/130873995/tatelapodunixavim.pdf
    • http://files.gtc-elite.org/uploads/1/3/2/6/132682570/netefikuvuboz_fifajog_jubakafa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/cone_beam_computed_tomography_in_endodontics.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/vagasasozotuzuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/why_bind_this_in_react.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1944/files/robogatovatakikijid.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/ag_barr_annual_report_2012.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9429/files/fogam.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/nirux.pdf
    • https://cdn.shopify.com/s/files/1/0432/1797/7504/files/luluvoxolenu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/28737831303.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/gst_amendments_for_nov_2018_ipcc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/7951637792.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/jexedakupijekavariwatore.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/autumn_leaves_guitar_sheet_music_free.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_off00005e56.bin
d1ad368bd5e0937d5559dc51c81c7d922a4733e0ff8c7d01dfabaf6eba9ff140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 5068 bytes
font_01_sfnt_off00006f61.bin
5dc9ce85172f0866bf81a48ed780c5824c4ccb851c024cbb2cd9cc2c9e07542c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 13732 bytes

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