Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b52779fbb0fe51…

MALICIOUS

PDF

45.3 KB Created: 2020-08-14 15:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c03d4747e5538a4f9d432188308ef25 SHA-1: b50c37514d92b5bf147bf7a1621a60623729a0c4 SHA-256: 87b52779fbb0fe51f7dadf5d9ab62814febdcaa3a0a0abd0651f6a23f3c71a15
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=house+roof+cooling+sheet', points to a known malicious redirector. The presence of this redirector and the link farm suggests an attempt to direct users to malicious content, likely for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=house+roof+cooling+sheet
    • http://files.pukapassion.com/uploads/1/3/0/7/130776388/8067236.pdf
    • http://dosejijew.chloescheel.com/uploads/1/3/1/3/131383936/3900959.pdf
    • http://linid.practicingsomatics.com/uploads/1/3/0/8/130814933/fapuxumeranufow_poxejoxik_padopoworuxe_dibof.pdf
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/14173234591.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/amadeus_basic.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/12545773046.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/zuzumemipet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/gunojiraminazek.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/mokemelinipikidalimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/94311336944.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/binapajif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/25423552749.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixiridujafogidubiba.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_off00006f26.bin
fd1654bc8ded5d96e71bff1cf3d4d84a79bd1feb8deed883f45298730182b1ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 4892 bytes
font_01_sfnt_off00007fc5.bin
de5f64bc9b64bbb4662c3e4b86cf62d942034a42d873b66fd54c171bd3e3eb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC5 13056 bytes

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