Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b548de216951e33…

MALICIOUS

PDF

50.5 KB Created: 2020-07-21 12:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 692040fae7c0e3f5ac4167e4e1918296 SHA-1: d366cc70ad3a70cfcdeb7a96a54a735ea4b8f77d SHA-256: 6b548de216951e3345f694a6ae5518bbdb7247b52abc8cef540a325642ed9219
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to educational materials ('Spelling connections grade 2 teacher resource book pdf'). The presence of many external links, including a link farm, indicates a probable attempt to distribute malicious content or conduct phishing operations.

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/wb?keyword=spelling%20connections%20grade%202%20teacher%20resource%20book%20pdf
    • http://files.childrenfirstmontessorischool.com/uploads/1/3/1/3/131384542/193f8de.pdf
    • http://files.dcmspto.org/uploads/1/3/0/9/130970009/gileraduz.pdf
    • http://files.journeytolegacy.com/uploads/1/3/2/3/132303082/572786db4ab1c11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/49734183407.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/90678344725.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/67574328010.pdf
    • https://cdn.shopify.com/s/files/1/0433/8574/9665/files/76883494149.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/talupiwuga.pdf
    • https://fotakut.files.wordpress.com/2020/07/46212731978.pdf
    • https://lizumiso.files.wordpress.com/2020/06/tavapobegukusemazilu.pdf
    • https://zudajela.files.wordpress.com/2020/07/66940090232.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/53352173067.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/lewozoxovatuwotoxiluja.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/roraj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/84958371884.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/pogamenomafujew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/92868787858.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/nemob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/82776424341.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_off00007ae8.bin
849dd46571850525c9a124f166fade15c4609a2da34221cf9fb01eed2210ecfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE8 5740 bytes
font_01_sfnt_off00008e60.bin
5517c805475ad4335fd5735d3a554b2c60da0bd277d465cf3155a1b678568900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E60 13708 bytes

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