Malicious PDF — malware analysis report

Static analysis result for SHA-256 11da7c7e425568af…

MALICIOUS

PDF

54.1 KB Created: 2020-09-01 00:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a568d507c42491c1539ae446f13b8f5a SHA-1: f829499837be142f12b93d87ee1a90535c3e1d02 SHA-256: 11da7c7e425568af0757d3e03a51c87e7890c1e797bf15e93a3269b93d76aad7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'RBI guidelines foreign currency convertible bonds' and the malicious URL, suggesting a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=rbi+guidelines+foreign+currency+convertible+bonds
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/rumudasagovabanemafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6794/files/guriluwurukikodazuxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/1213223455.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/bakugan_sub_indo_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/jijokasosalifuzexe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/99580934834.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4679/files/64019282113.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/baldur_s_gate_ii_enhanced_edition_manual.pdf
    • https://static.usrfiles.com/ugd/24853a_00f258fe8e6f4673bb9265e58db2c3fd.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_101e49e42fea4f7c9ae411494fce5600.pdf
    • https://static.usrfiles.com/ugd/99965f_bb39eb645b0a46eb8891668b36761ba1.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_ce80c1be140b41c0a41a20522beb0b9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_17ba511e3fe34490b03dda5a5c6be9df.pdf
    • https://static.usrfiles.com/ugd/345929_2529b519cd4e42de9a58bcd1ef0102a4.pdf
    • https://static.usrfiles.com/ugd/2074c9_f79a66383c6c48ce973322a747cdad77.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_off00009411.bin
5c637c566c1d528999d792d9b0e2e059b7d3eb50d09263d90cdebb54b6bb4473
pdf-font-stream PDF embedded font (sfnt) at offset 0x9411 5288 bytes
font_01_sfnt_off0000a63c.bin
2b7bb258817ecb1ad3810f9e6d85709776c03ed42fcd838f5be30ff98e9840f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA63C 10780 bytes