Malicious PDF — malware analysis report

Static analysis result for SHA-256 62243d84566256a4…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 20:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39333ded504964fffa6dd5c0efd2d80e SHA-1: 78367aad86090e60c94f0e0cb641b29359d9956b SHA-256: 62243d84566256a49b004dd032db09d34128c14158eee06fd4be83780d20f190
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is presented as a 'bootstrap 4 form login example'. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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=bootstrap+4+form+login+example
    • http://files.insightenergy.ca/uploads/1/3/2/6/132681378/5305763.pdf
    • http://files.mohammedsabrin.org/uploads/1/3/1/1/131164153/pesasagonowabovej.pdf
    • http://files.samwattfitness.com/uploads/1/3/1/4/131454500/xerizaxifuvinovabox.pdf
    • http://tiduros.genevievemariedavis.com/uploads/1/3/1/6/131606727/a3e5c18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/50300332698.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/3346560773.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/rerale.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/55067842458.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/woxigi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/bamazabijigelatidigitoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1285/files/christinia_debarge_goodbye.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/62320821568.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61403973964.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/pagonodisol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/44220424321.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_off00006ce8.bin
9d86f24adde556da2be88d39df8e9b2aa1a61bb16ac7e119579a1652ed07f597
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE8 5428 bytes
font_01_sfnt_off00007f58.bin
b59e6719844911499f663f0c794b704de917e12e4dcba9cca6b31708590b3c78
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F58 9920 bytes