Malicious PDF — malware analysis report

Static analysis result for SHA-256 177cb27d0e9a330e…

MALICIOUS

PDF

58.1 KB Created: 2020-07-08 16:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11a8b04aa6d7011f6608b9d0a1a77cf9 SHA-1: 49de7ee3aabf7adeacdffbbaa528cf28064b2e9e SHA-256: 177cb27d0e9a330ecaf2f007d681b4e4ccd355d36508fba79ba309e3b2d60c21
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF hosting sites, suggesting a link farm or spam campaign. One prominent link, disguised as a 'Sony ericsson v600i user manual', redirects through 'ttraff.com', a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a potential for distributing further malicious content or phishing attempts.

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=sony+ericsson+v600i+user+manual
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdf
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdf
    • http://files.frontrunnerbooks.com/uploads/1/3/1/6/131606670/fobigamikufejit_suroxapebe_takezojojoluwux_walosuwugefeji.pdf
    • http://files.christoculture.com/uploads/1/3/0/9/130968956/penifodi.pdf
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vitabude.files.wordpress.com/2020/06/detadovajowukusafabi.pdf
    • https://nizoxede.files.wordpress.com/2020/07/foxawebudefugim.pdf
    • https://fatovebuxi.files.wordpress.com/2020/07/fupifujizodazozenarumojo.pdf
    • https://jerobure.files.wordpress.com/2020/06/mimerakobikizobilef.pdf
    • https://nubejite.files.wordpress.com/2020/07/33476115421.pdf
    • https://kekuzupi.files.wordpress.com/2020/06/xaxakigumupaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.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_off00009b97.bin
c8a0f51e4f924270ae2fa670a2d0103384eb37c02bdcc996575c3b169cb1efa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B97 5308 bytes
font_01_sfnt_off0000ad7d.bin
e486aa03fb09ca74707b933459148ee4078f277ff7dd6de84720902d30ebb1a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7D 13824 bytes

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