Malicious PDF — malware analysis report

Static analysis result for SHA-256 209f8faba3277756…

MALICIOUS

PDF

45.5 KB Created: 2020-08-25 14:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 212195499a1bd91364b6eb2ac6260aee SHA-1: 2a386fec075866ad5f979c53c2a65c8cf2d723de SHA-256: 209f8faba3277756541a627582de5eeb3e7dc6f9319c9323baee28fb2a6e5b27
154 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, many pointing to Shopify-hosted PDF files, forming a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=bootstrap+3+contact+form+template'. This suggests the document's primary purpose is to leverage these links for SEO manipulation or to redirect users to malicious sites. 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/pify?keyword=bootstrap+3+contact+form+template
    • http://welatatu.mattjonesfiction.com/uploads/1/3/0/7/130776031/6000940.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/78397917368.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/conjunction_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/bid_evaluation_report_sample_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/20391126491.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/jovosedozigofelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/73567049130.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/rick_ross_rich_forever.pdf
    • https://cdn.shopify.com/s/files/1/0434/9214/7366/files/pifej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/pepodomuxakulonidukonik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/business_email_writing_activities.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4847/files/fundamental_attribution_error_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/59179805745.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_off0000758d.bin
3bc8aa107efdb6d32d614791ba17ff82c1f7c399627427c16f9d5e97451c9712
pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 5372 bytes
font_01_sfnt_off000087be.bin
8a923e00bd2f5b9a421db0beb49064bba8e40246766f91476524a96eec8f8821
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 9840 bytes