Malicious PDF — malware analysis report

Static analysis result for SHA-256 25421acbe9e61ce6…

MALICIOUS

PDF

40.8 KB Created: 2020-09-16 16:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b72bec255de09c6ac261f471eb9c6cc SHA-1: 86244f04e0164786267c8e4aa555be1cffd13322 SHA-256: 25421acbe9e61ce6236a46fe7221090494393626ad195c5ec3aa24a3ff67843f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a mass of external links, including one pointing to a known malicious redirector. The document body text, while heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=17.4+calculating+heats+of+reaction+worksheet+answers', which is the primary indicator of malicious intent. This suggests a social engineering attack aiming to trick the user into visiting a malicious site.

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.me/wix?keyword=17.4+calculating+heats+of+reaction+worksheet+answers
    • https://eac4242b-4fde-4c5e-bef1-2ef9a76a9be4.filesusr.com/ugd/6f5f23_4d68d85578d347aabff3fb0d98a8d00b.pdf?index=true
    • https://fbf4e847-cca6-4a9c-80f5-acb56d07fdc2.filesusr.com/ugd/dcf311_ce1d1c20277b4708bf0e1fde87370671.pdf?index=true
    • https://df7a2c21-13a1-4929-8e84-9917587d856a.filesusr.com/ugd/565485_8d73ce472e164f8da399624b84be9528.pdf?index=true
    • https://9444016e-06ce-419e-aa60-d42868082fd3.filesusr.com/ugd/277b62_c978c0e40bbd4d14be5bbf9b6cb23179.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/easy_adoptable_storage_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/1354972725.pdf
    • https://cdn.shopify.com/s/files/1/0451/1930/7929/files/boolean_algebra_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0461/3809/7817/files/sisusekojomosul.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/bible_in_simple_english.pdf
    • https://df77e081-7c41-451c-aaee-c1ff929adfa8.filesusr.com/ugd/3e5db3_ee0d0a3c9fa54a4aa77aea647516095e.pdf?index=true
    • https://26055df2-d2e7-4d13-b17a-2c6b534548bb.filesusr.com/ugd/bcc0e4_7e2ba91adb3e4629b0cdb1c98fe2953d.pdf?index=true
    • https://faaae760-d238-46d1-bf01-67f78201d10a.filesusr.com/ugd/49f5ef_8ce7f4333682408684169d342f00d8e3.pdf?index=true
    • https://ce325df4-d8aa-4faf-90b8-fe7878039e87.filesusr.com/ugd/3be48b_aa8a67513a4a4a7b9a70057cc60af6bf.pdf?index=true
    • https://519e0b21-74ce-457b-8432-79d97142d7b8.filesusr.com/ugd/529dbf_5313f0437064458b89ea6d5b9215eac0.pdf?index=true
    • 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_off00005fb9.bin
d30e8d9dda809de66c733118dd16ccd7517e661a71785e8f24902c002f706b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 5456 bytes
font_01_sfnt_off0000726b.bin
3fe72c9679685ddb1a30df8c3f5547cb97dce791816c7ef4378e77b6397822ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 10408 bytes