Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec1d2a45183f3e6…

MALICIOUS

PDF

34.6 KB Created: 2020-08-23 00:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b2916aaf7cfd0aa2144eaa51d98538f SHA-1: ef2e9a30f64531a313eb3b34ac1aa96333b359a7 SHA-256: fec1d2a45183f3e674d8a220431bf9f8ed0844c4a799433b8bb7b6940b55ea3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link disguised with a keyword related to formal shoes, which redirects to a malicious URL. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link further supports this assessment.

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.cc/pify?keyword=edgars+ladies+formal+shoes
    • http://kuziveje.marisatejeda.com/uploads/1/3/0/8/130874493/2b93ff87fc0b.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/72747136396.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/wanululizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/76282549998.pdf
    • https://cdn.shopify.com/s/files/1/0431/0958/0961/files/76065383280.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9965/files/20387272192.pdf
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/aptitude_question_papers_of_infosys.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/85555434467.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/e_aadhaar_letter_password.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/94353998909.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/xojenuzanegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/51104644213.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/mufulesasivanazavesipi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046ee.bin
d0f54699b86298c4484f1a587934901ccb60a40242c9ab1d444757cfff7c0524
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EE 5276 bytes
font_01_sfnt_off000058bf.bin
1aff331e8d7bd579ea7db7c8e1c690b86e15c870bd0147e2054d7344fe0d916e
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BF 11388 bytes