Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b2166ec93a0ba6…

MALICIOUS

PDF

49.2 KB Created: 2020-08-03 22:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1f8ace431d26f34a323cd9e4d50460a SHA-1: 24c54a0c33c1b892cc1c7fed99dd6d75722a5449 SHA-256: 16b2166ec93a0ba626adf77dfcc79b44e19f9751cde16e0f51a1b1ad9cc0ce1c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a visa application form, which redirects to a known malicious domain. This indicates a phishing or scam attempt designed to trick users into visiting malicious infrastructure. The presence of numerous external PDF links suggests a link farm used for SEO manipulation or to distribute further malicious content.

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=irish+visa+application+form+pdf
    • http://files.maximevaporator.com/uploads/1/3/2/3/132302814/xabaje.pdf
    • http://files.heidiwillbanks.com/uploads/1/3/1/4/131452867/8260557.pdf
    • http://files.visioncommunication.org/uploads/1/3/2/6/132681219/xukanutut-loduzuvedi-nixala.pdf
    • http://files.ijss-sn.com/uploads/1/3/2/7/132712214/7483883.pdf
    • http://files.hilltopangusfarm.com/uploads/1/3/1/4/131408086/dukanifixobizug-kogasidige-jobix-fisuzodogole.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5835/6639/files/86046875456.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/megova.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/36638925374.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/fupax.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/xutiwuzas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/7054776161.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/82012843978.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/1232372681.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/35646236503.pdf
    • https://cdn.shopify.com/s/files/1/0440/1099/5862/files/780519851.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/87136100217.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_off00008350.bin
f69853ab417c49dc37585cd2e5c9f05bdb15bb4f9788054f60cca011dc380080
pdf-font-stream PDF embedded font (sfnt) at offset 0x8350 5392 bytes
font_01_sfnt_off00009587.bin
01aec52eaef8d3d922be8072a9b9eada408fae580dddebe4457360a05ce8d743
pdf-font-stream PDF embedded font (sfnt) at offset 0x9587 10108 bytes