Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f38e339c99852a9…

MALICIOUS

PDF

54.3 KB Created: 2020-09-02 13:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fbdf7adf5ac8a26ec96a8eb4752eba1 SHA-1: d6645f8fee17b78a0cf5ffe997010125d57d5296 SHA-256: 7f38e339c99852a92985d64eea3c57ce78283115e75b3965b3ce254bb9275623
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a game download, aiming to lead users to harmful infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a malicious redirector, supports this assessment. No scripts were extracted, but the document body and heuristics point to a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=beyblade+battles+game+free++apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/26660718919.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/66680754847.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/728313151.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/88902412573.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/vabalaze.pdf
    • https://static.usrfiles.com/ugd/0049ca_1653de936449448b95e53d359626b16e.pdf
    • https://static.usrfiles.com/ugd/dcf9ad_05b47eabba964d3e89d875e94ba51f33.pdf
    • https://static.usrfiles.com/ugd/a48928_87586509673e469b947802776a0a9bb4.pdf
    • https://static.usrfiles.com/ugd/ec0c41_0e60cb8d93d3488780835d4d878ee2e6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3215656586.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4340/files/samsung_galaxy_amp_prime_review_cnet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7965/3789/files/players_handbook_2.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ea3.bin
2b18bdd40369129fba0daa698cdc5b975975c0f08c56dc164bb9b8e6e122d333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA3 5716 bytes
font_01_sfnt_off0000920e.bin
85dab8cd7284aa4681ea29236559f60a948665bda1060dcda0b5c764253a28c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920E 11012 bytes
font_02_sfnt_off0000b772.bin
13c540cfff82c4dbf750c4d8c74e2b7b4ef1ed85145f82e59f5e6266b522e2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB772 16096 bytes

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