Malicious PDF — malware analysis report

Static analysis result for SHA-256 66192f99a3f1006b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-20 11:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4bebf03eb5818c15ff8137b52c79362 SHA-1: a405c86d9e04a1d916082c7b39bb94de9f25ba87 SHA-256: 66192f99a3f1006bb1da9c02ea7bab12651be7cc5b394f6f6d7234a73cc0af8b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to lead users to harmful content. The document body and embedded URLs suggest a lure related to marketing guides, which is a common tactic for phishing or malware distribution. The presence of numerous PDF links, many pointing to Shopify, suggests a link farm designed to obscure the malicious redirector.

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=influencer+marketing+campaign+guide
    • http://files.isnsalihsanacademy.org/uploads/1/3/1/4/131409009/kumuzoj.pdf
    • http://busido.ahmotivation.com/uploads/1/3/2/8/132814930/xiwuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/multifactorial_genetic_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/balancing_chemical_equation_examples.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/98698697368.pdf
    • https://cdn.shopify.com/s/files/1/0435/5273/5391/files/aves_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/lukazubedodujo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/diwirasadorevipiduwoxox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/17145078731.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/zofol.pdf
    • https://cdn.shopify.com/s/files/1/0434/9958/5696/files/amazing_grace_chords_f.pdf
    • https://cdn.shopify.com/s/files/1/0438/1048/8477/files/set_gopath_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/kafivazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/ketone_allgemeine_strukturformel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/pupovotejiz.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_off000076fb.bin
e2f20d64e05f34e8f53a26983688d04c3c7603fa1c790ef9a48ce0c6c8c8475f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FB 5300 bytes
font_01_sfnt_off000088dc.bin
ac45701a5d194d0c8f359374070a2380e308a1f30c0da1a466e9b65131fdcd3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x88DC 10020 bytes