Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f04e7e80fa9666…

MALICIOUS

PDF

40.7 KB Created: 2020-08-29 23:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13e82751ecc87f6edbf5a142c9bc7d7c SHA-1: 210a80e01ec2b61554cd2d3ed2e25a9c4ef7918d SHA-256: b3f04e7e80fa9666432b3bfa0752ab6053ba635e180fecec49e288d8a6ff82aa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure (ttraff.com). Another critical heuristic identified a mass external PDF link farm, with many links pointing to shopify.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=adding+integers+worksheet+pdf, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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/wix?keyword=adding+integers+worksheet+pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/96336870448.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/20949812695.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfdc32b0b66e476689a6d2f217995cc9.pdf
    • https://static.usrfiles.com/ugd/ae059d_4c5512b54fe04fcab1ea9c8ef1e27ddc.pdf
    • https://static.usrfiles.com/ugd/b8c837_0265392217ca4d0c9113f8cf1b3a9dd3.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/how_to_install_ipa_on_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/xeluvajirabim.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/developmental_psychology_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/boy_scout_popcorn_order_form_2019_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/3839/9912/files/luvukeguxuwidusov.pdf
    • https://static.usrfiles.com/ugd/b8c837_0112073a40784c0b8b3ba496522f7bcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6046e11e01d4364a2d3219de7610d82.pdf
    • https://static.usrfiles.com/ugd/a467d2_196a5e2a8db94a8abe0e2f93a68e6459.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdc032211353441aaf2642c7d3f9f21f.pdf
    • https://static.usrfiles.com/ugd/510a18_00f867bb69314d5abdd1ec668a1d0de0.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/
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/developmental_psychology_journ

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b1.bin
beb5422068eff0b6baf2aaca61929357687cd17060b40e04fcc4b3c7c005a9db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 5204 bytes
font_01_sfnt_off00007279.bin
fe92e3d92bad55a388dbdbc0cade2640445f2e589a203249b64222b7af4c3eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7279 10304 bytes

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