Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a590feac8376aeb…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 06:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30141b69bb5973b80850ed4aa5876f88 SHA-1: 8ce875b72a3bd0047b66ba0f42b77f5de200fc22 SHA-256: 5a590feac8376aebaa8e890e6b4de319da502e5e03b2d32666fef46b39eb29b0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=crime+in+south+africa+pdf', suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=crime+in+south+africa+pdf
    • http://files.costaballenamanagement.com/uploads/1/3/2/6/132681479/xegivol_wunigevuduwupa.pdf
    • http://zojeko.jeujeulafoille.com/uploads/1/3/0/7/130775403/48a1cdd201993.pdf
    • http://fuzuf.lorrainechandler.com/uploads/1/3/1/0/131070450/6592731.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/parliamentary_system_and_presidential_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/xebuzoledo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/80112398018.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/apostila_blender_2._79.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2913/files/the_economist_magazine_free_download_2020_july.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/91538668382.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/73525829708.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/24570981365.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/53849622871.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/practical_machine_learning_anomaly_detection.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/jobakubazakolofavukolaruw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/22686457470.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_off00006d4f.bin
e738c30d9b784eec73de0014a63804704b5f206f33e42cdb8efa106cc8646763
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 5268 bytes
font_01_sfnt_off00007f0b.bin
b4112dd55a2b92c5030c86df0f1fe2fd4e350f4fc6a28e0ea068736043f0b9a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0B 9928 bytes