Malicious PDF — malware analysis report

Static analysis result for SHA-256 da915a034aacb29e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 05:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfaa71c58cd1375577800590354e2a06 SHA-1: f53351e2a20ce11efac5bf3a65eecdbd0022f29b SHA-256: da915a034aacb29ee2fd22eaa3a2886f28df39c90b11dd741ff24d035e40f0f7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to 'Caribbean airlines contact information' to entice users to click the malicious URL. The PDF also contains a large number of external links, characteristic of a link farm.

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=caribbean+airlines+contact+information
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/zomowawupop.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/tusagalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/6581741250.pdf
    • https://static.usrfiles.com/ugd/41a0b6_07e0065edb234b3c961af99e4ae5f460.pdf
    • https://static.usrfiles.com/ugd/b8c837_34660902ac7545cfbb8a3f9c8db5ca92.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e552a6c1f93481cbe7628d07a5771c6.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/pantheon_cookie_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bluegrass_stockyards_lex_ky.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/hard_vocabulary_words_with_urdu_meaning_and_sentence.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/52496347387.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef4.bin
c800247c1b396ec52b198e56e6f9ecf25553c8eb589ff337f3bb52a04beb3581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF4 5072 bytes
font_01_sfnt_off00008017.bin
fd5e774e2206296ee7aa9ac152f500b9e5e4da1efc724321ef82e68cdc8f26f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 11384 bytes

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