Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f132e9dc8fc23f2…

MALICIOUS

PDF

44.7 KB Created: 2020-07-27 19:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1caf7d093e4e4aad35a4f7fcb8384bfe SHA-1: f37d75effd0c89477686c45deb82f60c49e4368c SHA-256: 0f132e9dc8fc23f2a4875869c93681b2894a358ad0bb9c33d66904332439dd47
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as an application form. The document also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were extracted, the presence of malicious links and the overall structure strongly indicate a phishing or redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bnm+ccris+application+form
    • http://files.ceresevents.org/uploads/1/3/0/7/130738701/tokirijupub_fumogusowa_bisofakuzawaru.pdf
    • http://files.bostonareamaskinitiative.com/uploads/1/3/1/4/131437941/36468593beb3f56.pdf
    • http://files.music2dance2radio.com/uploads/1/3/0/7/130740563/5790826.pdf
    • http://files.mvrmoto.com/uploads/1/3/1/3/131398085/votasusukagaditifim.pdf
    • http://files.maci-mcs.org/uploads/1/3/0/7/130775174/ecea2746e62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/molemimukavekoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/76849925625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/44063262431.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/54239261585.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/luduz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9931/files/69494540641.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/lakajivevatozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/98414564124.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/64773214604.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/liwememubaxetojezitabetur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/74587488840.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/bejeposafapalalizajejix.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_off000071a6.bin
49c49c32658954d00c19f061fe052acc68ff307774b9981d48fe928e3acacfee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A6 4880 bytes
font_01_sfnt_off00008208.bin
02c5a1e057de218b9d08caedb0f6e0378a4cbe659f523dc6f194ddd7ba288ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8208 10364 bytes

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