Malicious PDF — malware analysis report

Static analysis result for SHA-256 711cd31abd3e0eab…

MALICIOUS

PDF

116.5 KB Created: 2020-07-24 21:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e42bf9f587359accfc070a9472aace1 SHA-1: 6c94bec5c852a5fa17f6d7bce333c840fad98fdf SHA-256: 711cd31abd3e0eab60e28d013a5e5f716b98e818cbc3249ed72603cf3fbfa587
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to an 'annual report', aligning with the 'SE_INVOICE_LURE' heuristic. The presence of numerous external PDF links further indicates a link farm, likely intended to distribute malicious content or engage in SEO manipulation.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=godrej+properties+annual+report+2015-+16
    • http://files.bagusnugroho.com/uploads/1/3/0/7/130775712/b5332705cb2de1e.pdf
    • http://files.lwyouthstrings.com/uploads/1/3/0/9/130969360/vaparogipo_zugikidiwode_bobuwatewore_gojuxop.pdf
    • http://files.learningthroughyearning.com/uploads/1/3/1/4/131406800/7974c36.pdf
    • http://files.lederan.com/uploads/1/3/0/8/130874587/c942efd22.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/47285856821.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5240/files/jivopavivesepanegugopabup.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/43244344810.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/26120564702.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/wemawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/sojujofibezazebikejuzod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/26029678290.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38655606666.pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/rufimigalovijixugedofediv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/49379550322.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/10189115193.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/natejatedin.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_off0001843f.bin
9fddf2297073498105fda16dc8a7bee8b371db22a78883fb87b4b4521a00ae8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1843F 5580 bytes
font_01_sfnt_off0001975f.bin
7fe321a19372573b8eb073ea22c25b6e1d704abb718c24d7675e0c9f30473988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1975F 14208 bytes

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