Malicious PDF — malware analysis report

Static analysis result for SHA-256 7750068b65c39816…

MALICIOUS

PDF

44.9 KB Created: 2020-09-08 12:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038288c0378f1366229a4a077668ae36 SHA-1: 5b494a29308292664593e42eefee01b705fc7a29 SHA-256: 7750068b65c39816d0b1f80ec09e4534811a7ab47e256266d95701e3f27eb53d
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Smithsonian channel uk freeview guide'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.cc/wix?keyword=smithsonian+channel+uk+freeview+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3e87bf_6896632502d74cf1943ac8ff231f4fcf.pdf
    • https://static.usrfiles.com/ugd/c268f7_b10a38bbab5d46cd95f2879e9a5bfb48.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8353d9a4b014656bbdf633219a8d520.pdf
    • https://static.usrfiles.com/ugd/a72fa8_422a287ffcbc494aa0f46ea13a8ef20d.pdf
    • https://static.usrfiles.com/ugd/c33cdb_28d1b026657a44f587eb87cdf751eeb4.pdf
    • https://static.usrfiles.com/ugd/ad2ade_d687bfbd758e4809983961d578c52452.pdf
    • https://static.usrfiles.com/ugd/227d0f_6267833e029f4ad3bfb89dd8d4bb14fb.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_38fb0b4a3f3c47ff8502d2b8c0bff1ba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/23057972785.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/58803154521.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9703/files/fukovapej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/dosisabaxupifaxakiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/xomop.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/95553681619.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/joronedimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/akhiyan_song_by_kanika_kapoor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/amongst_form_a_sentence.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_off00006776.bin
ec6e69c6ff9eff18a5fc4e4142726532f9401c180e3b173287cc85d0cd0a7601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 5752 bytes
font_01_sfnt_off00007af4.bin
723ea41561a61d965d0a6febf526f5e4c32c7e2acec3dfb7538bbf11bf043cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF4 13824 bytes

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