Malicious PDF — malware analysis report

Static analysis result for SHA-256 718f98f2bc67d27c…

MALICIOUS

PDF

50.8 KB Created: 2020-08-31 13:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ae92757cef600b11639004a2d08ea9 SHA-1: 621b270c6411dbb18c63bb331066a605a05d8d0b SHA-256: 718f98f2bc67d27c2e43652129f2dabfad81a568034034c9a51655fb39ba307c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a search query, suggesting a lure. The PDF also contains a large number of links to Shopify, likely part of a link farm to improve SEO for malicious content.

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=numero+de+avogadro+formula
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/dekawuleguwisonewefed.pdf
    • https://cdn.shopify.com/s/files/1/0432/0906/4607/files/essential_oils_list_and_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8065/files/tovetok.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/36943410387.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/yellow_submarine_ukulele_tab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3224/8469/files/adverbial_phrase.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3580/files/83239648885.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/bittinger_calculus_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/traados_de_caldeiraria.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/veletogirenoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/21495078844.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/application_convert_webpage_to.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/sitiv.pdf
    • https://cdn.shopify.com/s/files/1/0448/2108/6368/files/adverse_reaction_to_metformin_icd_10.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_off000088a3.bin
318b9114a1cc6302b599765f08292edbe3e83a09c1053e7f6e1bec61169fda92
pdf-font-stream PDF embedded font (sfnt) at offset 0x88A3 5080 bytes
font_01_sfnt_off000099e9.bin
625f6f069fc74bba6eda03f21d929e1f4aa9687754e1290278e4370435959407
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E9 10796 bytes