Malicious PDF — malware analysis report

Static analysis result for SHA-256 16605005e9477321…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 06:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95188e53e20fe2f59d1c1a3239cfad64 SHA-1: 1096675b7eec4129e533babd386349fdc028d707 SHA-256: 16605005e947732109fa9e8208fadd6fbbbdfe61bbd39da66d2832e5720df7ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=s%2527+int%25C3%25A9grer+dans+une+classe'. Additionally, the PDF exhibits characteristics of a link farm, containing numerous external PDF links, one of which is 'https://cdn.shopify.com/s/files/1/0436/0113/3731/files/delanonolodutelenegita.pdf'. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=s%2527+int%25C3%25A9grer+dans+une+classe
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0113/3731/files/delanonolodutelenegita.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/54200886742.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/huawei_p9_plus_android_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/autonics_tk4s_manual_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/lejejepeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/1336543698.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/fakarudaxokiweg.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/videtotetixanul.pdf
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/silefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7516/4574/files/kepasavipupibilefu.pdf
    • https://cdn.shopify.com/s/files/1/0466/2807/7733/files/41647191485.pdf
    • https://cdn.shopify.com/s/files/1/0462/6884/2146/files/furer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6517/1354/files/95606395155.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/jovopufiziwinatovusonuk.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_off00005b5b.bin
7e0a7f44f65c8c5b5f2200aeed94d92c43811ce7131abfc45fa081ae36cd3bcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5B 5384 bytes
font_01_sfnt_off00006d6a.bin
adff70200603df833b8723ea1a8ac5fe7b2887190eb70bf08f64a4462d93d817
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6A 12480 bytes