Malicious PDF — malware analysis report

Static analysis result for SHA-256 1418768ca43940d7…

MALICIOUS

PDF

71.3 KB Created: 2020-08-30 17:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a6121268c9d7c8c6e79830cce29128 SHA-1: d32ad667129e672a2e98b60defb3a7722e233387 SHA-256: 1418768ca43940d75ba2db40f14f310573a0d86079a481cad73b5e70bd499201
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to drive traffic to malicious infrastructure.

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=gameboy+color+zelda
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/22289404820.pdf
    • https://cdn.shopify.com/s/files/1/0435/6354/8831/files/34012650342.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/jofeku.pdf
    • https://cdn.shopify.com/s/files/1/0465/3472/1694/files/42158652009.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/36933867052.pdf
    • https://cdn.shopify.com/s/files/1/0434/6544/1430/files/94357431680.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8908/files/kuworamuzunis.pdf
    • https://cdn.shopify.com/s/files/1/0447/0882/3193/files/wutixamajenuwowanaposud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/engagement_party_program_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5558/files/tata_company_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zawitowawipujeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/illustrated_oxford_dictionary_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae92.bin
58aa611030d38a1e310e305c754e3ebc21671ba551671a3e02c69afcacf622b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE92 13460 bytes
font_01_sfnt_off0000da11.bin
40e1e5e7562fdeb0325349aec490b78160f8dc63ce58eba08f063ba6892be45c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 5228 bytes
font_02_sfnt_off0000ebd7.bin
81de75e62eb30dfa4fcd7c14a4e122a0aa327a56b2933819ad9e6c652e2f4231
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 10604 bytes