Malicious PDF — malware analysis report

Static analysis result for SHA-256 614501ec311c450c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-17 12:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1eab9656b6dfdbb106d3c00e19b961f SHA-1: 00768e11a0d01dd4c352be9b539866cab512509f SHA-256: 614501ec311c450cb38c53f5aabdf87ba90bf367ade67729a55d16380ec8fbff
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body and embedded links suggest a lure related to application forms, directing users to the malicious URL https://ttraff.cc/pify?keyword=unisa+online+application+form+2019+pdf. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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.cc/pify?keyword=unisa+online+application+form+2019+pdf
    • http://files.milepost0creative.com/uploads/1/3/1/4/131408142/8088500.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/adobe_indesign_cs2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/menosadopesubuzafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/29828023821.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/aadhar_card_form_download_up.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/kifinibapesejutitolirivom.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/happy_anniversary_wishes_for_husband_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/33230981810.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_off000060f7.bin
392d5a10a6793400aedeadf86d52a9370baf21f014f8090609aa3720c3115e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 5772 bytes
font_01_sfnt_off0000748a.bin
d9c8191b489dd8893cdeb411f32f232c2bc614d7a01f38b0e2cf001f4f2e32e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 10112 bytes