Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f150723b4ec0dc…

MALICIOUS

PDF

40.9 KB Created: 2020-08-09 08:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54a7531cd3f0a48a29dd3eb95ca670d4 SHA-1: 45cde76c3b889885a665ea7dcb2617070c2006ef SHA-256: 05f150723b4ec0dc5e583c2f3177ec7935456d24ebd806a3a19af634b72b0975
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 are disguised as PDF files hosted on Shopify. The primary malicious link, 'https://ttraff.com/pify?keyword=quistes+blastocystis+hominis+pdf', is identified as a known malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=quistes+blastocystis+hominis+pdf
    • http://diwopov.minorcanmayhem.com/uploads/1/3/1/3/131381428/574c75310d0a5.pdf
    • http://wufujef.barneyspumps.com/uploads/1/3/2/3/132303382/432d4e1821188.pdf
    • http://mojeted.5thstreetfinancial.net/uploads/1/3/1/3/131380600/nazopaxujafazen_sazaro_labiluna.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/majasilesopafinajakifimuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/1535257479.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/9881912326.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/kajurinowesegopevow.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/muxaberizerik.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/bubokabizorugifunexavuze.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/potassium_bromide_msds_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/levidalujidetiwutoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/22972541428.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8647/files/bibazubotuxojifajipeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/mefudekonezaturanute.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/nezut.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/82832855017.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0829/files/zifimewosuragesoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/zijitepaluvufup.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_off00006222.bin
559b6db01fb33093729d7851d26030e282b078456ec054361de2055d1df5594e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 5600 bytes
font_01_sfnt_off0000750b.bin
1d394b6651722f54776cb4d4ad79c9492fd7e6228f09c27d42c2c0ba771bd116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750B 9884 bytes

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