Malicious PDF — malware analysis report

Static analysis result for SHA-256 09495f9c7562996c…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 02:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 978e0dcd5eee14d73d998c533128ca32 SHA-1: 26d59a1f93f00f07324be65935529625b8209e00 SHA-256: 09495f9c7562996ce1de509536a15257350c7ceff09155c9fde7f8f406d11606
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious document.

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=sinusoidal+waveform+excel
    • http://gizitali.sarahwyldphotography.com/uploads/1/3/1/3/131384169/tifeb_sajeva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/vilalebimewopagunijixubif.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/62535829964.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/podugujebaxulom.pdf
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/baixar_no_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0462/3925/2631/files/3220729125.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/4554452302.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/brgschaftserklrung_kredit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdf
    • https://cdn.shopify.com/s/files/1/0431/8881/3988/files/american_gods_neil_gaiman.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4892/files/dunopokuwegisulos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/avast_cracked_license_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/78485804145.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/23439212931.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/fomopedelul.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_off0000628d.bin
a29ee0921591e63399496084de8a941cf746a9824f1c0ecfbd9b6def6f8a9c7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 5488 bytes
font_01_sfnt_off00007533.bin
d1316a7617cb92f26fc3606b18ef1e31606b6b307dbc919e318568fa786ac4e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 10656 bytes