Malicious PDF — malware analysis report

Static analysis result for SHA-256 031ea4bdb9f74929…

MALICIOUS

PDF

73.3 KB Created: 2020-08-14 05:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae58731f0663bac73a512fe202e361ac SHA-1: fa0f3e8b6e48ffec4b0cce50123944a1b86d5ed5 SHA-256: 031ea4bdb9f74929272a16f4ec2f3cd8e1e0b59b13751956b78b2e59159d7aae
194 Risk Score

Malware Insights

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

The PDF contains embedded links and text that mimic an 'Aadhar card mobile number update form offline', a common lure for phishing. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary embedded URL, https://ttraff.com/pify?keyword=aadhar+card+mobile+number+update+form+offline, leads to known malicious redirector infrastructure. The 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a larger scheme to generate traffic through numerous links, with one pointing to a Shopify-hosted PDF. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=aadhar+card+mobile+number+update+form+offline
    • http://files.eklaboutique.com/uploads/1/3/1/3/131378835/1955927.pdf
    • http://lasejad.psvideography.com/uploads/1/3/0/8/130814328/256eddb6d3e04.pdf
    • http://sawir.southwestharbormaine.org/uploads/1/3/2/3/132303124/5515417.pdf
    • http://mojerina.emilyjoshua.com/uploads/1/3/1/8/131856462/8084c438a21.pdf
    • http://files.juliafeildenracing.com/uploads/1/3/0/9/130968947/pijefoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3913/6661/files/norowezilasosakitovozuxir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0439/2353/8088/files/79757514830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jatebilebasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/ceremonies_of_the_liturgical_year.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/pdf_converter_to_word_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/kujuperasipago.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/minecraft_pe_0._12._1_mods.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/kipewag.pdf
    • https://cdn.shopify.com/s/files/1/0449/8610/6014/files/pdf_to_docs_i_love.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2b7.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B7 2828 bytes
font_01_sfnt_off0000ccb1.bin
3850ba80197a81539d15b4aaa978c948384a26bf307e776b200513f714608d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 5348 bytes
font_02_sfnt_off0000deb2.bin
d15aa38f866413b71e2b7567e612daba302e2a46e65275a4ae5fdf9c98ba6cef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 10288 bytes
font_03_sfnt_off000101e5.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 16164 bytes

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