Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f18042ebf28252…

MALICIOUS

PDF

59.9 KB Created: 2020-07-31 19:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6a2a97dcc9f6ae484474eb1aab8ff28 SHA-1: 02c363a2379815e4ffb08036d05a872d0065a55d SHA-256: 64f18042ebf282524bf0993b1bb6cb92332eae23c1dba9edd1cf43649b8036d5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=swgemu+village+guide
    • http://files.lincolnleapers.com/uploads/1/3/1/4/131406659/b2e55ce219561eb.pdf
    • http://files.toddhirsch.com/uploads/1/3/1/3/131384721/7047937.pdf
    • http://files.brima.bg/uploads/1/3/0/8/130813364/4872254.pdf
    • http://files.rubysresidences.com/uploads/1/3/0/7/130775831/tewoda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/gukowikebibefasatagexelob.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/27684282403.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1503/files/gurelidelet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/kumiwevafulag.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4490/files/86201573878.pdf
    • https://cdn.shopify.com/s/files/1/0429/2005/0855/files/74369186516.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/62637526759.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/12984033055.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/tatokobuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/39263283463.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_off0000ad7f.bin
9233dd579a2216c6b564d20c96c1f70e893fc86b71cc9167762c826dd74f5b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 5124 bytes
font_01_sfnt_off0000bef6.bin
4376f0a92d97c9b8beecb601ddc6b5025ddc1058a0f86ca8e4dec94c96d11122
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 10388 bytes