Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa6dd06ed9542b4…

MALICIOUS

PDF

35.0 KB Created: 2020-08-12 03:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a863f4865fc992c027e3f81c4780ec36 SHA-1: aa15278bc3445e44ab3cd15b18d0835b3c3f8b9a SHA-256: 5aa6dd06ed9542b4404d4707356f14e64f1f4dd1aede4fb994b52a86fbd7d58c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to what appears to be a link farm designed to drive traffic to other sites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=dimensionality+reduction+by+learning+an+invariant+mapping+pdf'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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.cc/pify?keyword=dimensionality+reduction+by+learning+an+invariant+mapping+pdf
    • http://files.tallahasseechinesemedicine.com/uploads/1/3/2/3/132303012/majejonex_dilate_fuxel_linubimodok.pdf
    • http://files.mcclellandcollegemusic.com/uploads/1/3/0/7/130739727/ce2ea8bafe4b92b.pdf
    • http://files.carsesus.org/uploads/1/3/0/8/130874524/mumukavakirirep-bixusopumekaz-xumezax-putof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/xokonozidivirimubifefor.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/94178215600.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/amiodarona_dosis_de_impregnacion.pdf
    • https://cdn.shopify.com/s/files/1/0440/4094/5829/files/61378645965.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nexus_plugin_fl_studio.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/54106634294.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/14422746815.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/vosugo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/gagimasakuwipivafenufinek.pdf
    • https://cdn.shopify.com/s/files/1/0436/5431/6197/files/zofepemepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/73637685282.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_off000048b7.bin
8127d4bfab367dd10ae89bbddb99440f2c990acc6cb45d489962a8e9d8ef6d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B7 5776 bytes
font_01_sfnt_off00005c51.bin
8a39785679d310dd195fdebf8a798149ca62b0ccef9442ef35fc8d64f9f6276c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C51 10108 bytes

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