Malicious PDF — malware analysis report

Static analysis result for SHA-256 16268c0215d43396…

MALICIOUS

PDF

42.6 KB Created: 2020-09-07 15:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69acec16d0272d045c0dede905d6838b SHA-1: 1619dcd6a59bc0da7256d894bdba96d9935d4922 SHA-256: 16268c0215d43396d32f85471f0c9bfd299ee52649bc66b76aba3884e4cb9377
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.me/wix?keyword=alliteration+worksheets+middle+school, is flagged as malicious and likely serves as a lure to download further malware. The document body, though heavily obfuscated, contains this URL and appears to be a poorly constructed attempt to disguise the malicious intent as educational material.

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.me/wix?keyword=alliteration+worksheets+middle+school
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/fazulawapitizemimovafafus.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/raxadimiladusexatopame.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/gezobegulareko.pdf
    • https://cdn.shopify.com/s/files/1/0434/7265/0397/files/62251073737.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/pdf_digital_marketing_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/17619558739.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/sezumogiverexoloven.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/argument_critical_thinking_logic_and_the_fallacies.pdf
    • https://cdn.shopify.com/s/files/1/0432/3619/6507/files/deturejididikoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/power_standard_trial.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/30861372633.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/jajiwitepupawun.pdf
    • https://cdn.shopify.com/s/files/1/0437/0877/6600/files/life_after_death_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/53426513927.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/artists_rethinking_the_blockchain.pdf
    • https://cdn.shopify.com/s/files/1/0434/4718/9670/files/setosovuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/gelalekavewapasu.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_off00006902.bin
fdea07248541b042794141e7ce4c20a4f836a9c44b4e7e46afb3d0248d5f4e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 5324 bytes
font_01_sfnt_off00007afe.bin
921621de3538af611695343284c398b73b9f8eb6699007f1d3514082f5d1679b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFE 10120 bytes

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