Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e66d322ee37d5fc…

MALICIOUS

PDF

44.8 KB Created: 2020-07-08 23:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352dbee77cc05a3ca17cc057526a581b SHA-1: 307d49cd4a37e08952ddcca2270223a863a03bef SHA-256: 1e66d322ee37d5fcd262ba2e493d225aa98518cfbb27b32ae9de90f14bc9222a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though partially garbled, includes the target URL and other suspicious links, suggesting a lure to malicious infrastructure. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector and a link farm.

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/wb?keyword=ring%20of%20fire%20guitar%20tab%20pdf
    • http://files.annagalatirealtor.com/uploads/1/3/0/7/130776718/979473.pdf
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdf
    • http://files.zamdevelopsj.org/uploads/1/3/1/1/131164534/7449164.pdf
    • http://files.ellianajolenasbows.com/uploads/1/3/0/7/130776481/malifanu-ximazevitepega.pdf
    • http://files.hello-baby-toys.com/uploads/1/3/1/4/131453807/4352687.pdf
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdf
    • https://nafegef.files.wordpress.com/2020/06/bodebesapixigozegejuvoda.pdf
    • https://sajolesogiw.files.wordpress.com/2020/06/bodorofibarexaxomefe.pdf
    • https://jowakasej.files.wordpress.com/2020/07/17721517600.pdf
    • https://varotedip.files.wordpress.com/2020/07/bijedizizanuw.pdf
    • https://viketiba.files.wordpress.com/2020/07/satadobiwi.pdf
    • https://pagokag.files.wordpress.com/2020/06/82542560400.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006599.bin
81bf6e4f569b837aa4d98132f01790f9c3f3d7d635f094cc772ed75e356bf175
pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5028 bytes
font_01_sfnt_off000076b8.bin
b4e3c1a4c6c5e6f6145307f40c5ecc29ee5090398b9cff9a89cc49ccc1015f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B8 15376 bytes