Malicious PDF — malware analysis report

Static analysis result for SHA-256 094b9e3768d827d9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-06 14:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87999f3423fc37046956683afe33e42c SHA-1: b081ec4dc2e007ffd1d6941a4093d9ca25549835 SHA-256: 094b9e3768d827d9dc3d51ddf22a6ec8faa20a3aa7b99b5e9c997e109e28a856
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=barycentre+cours+pdf. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/pify?keyword=barycentre+cours+pdf
    • http://files.invertedsyntax.com/uploads/1/3/1/3/131379894/duxabeg.pdf
    • http://paval.downtowndogs.ca/uploads/1/3/0/8/130813054/3003874.pdf
    • http://files.concernedcitizensohio.org/uploads/1/3/1/6/131606395/107c1df.pdf
    • http://tafinofis.jsarchiveconsultancy.com/uploads/1/3/1/1/131164312/70f0eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/rojivipulaboleboxumol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/wugadoginatubatokelawezes.pdf
    • https://cdn.shopify.com/s/files/1/0441/3492/4440/files/paretonuwokafu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/raruzewagupefilamad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/intex_pool_pump_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/gowifireja.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/craftsman_yt_3000.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/54271623491.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/dewon.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/58454663771.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/juzilezaximipabuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/12381481209.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/5495689099.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b54.bin
ddeddbacefe7e9f402f05b969960730be1254a2d27f59885c9663a019ab214e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B54 5268 bytes
font_01_sfnt_off00006d5a.bin
afab69104dce6a0e840de04252c0f609f3e5d60c3384595e315c225a1945f1ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 10060 bytes
font_02_sfnt_off00008fca.bin
4a3d97cb0f01b67db0f2c0c67b38c82a67e4beafd846d3a18a1ca53b20acedf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCA 16100 bytes

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