Malicious PDF — malware analysis report

Static analysis result for SHA-256 564d59bf2d0d4da9…

MALICIOUS

PDF

35.5 KB Created: 2020-08-14 05:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d850a2699cb19770ad232569add57208 SHA-1: 771bdd2e0534e7a29335ba2776681d2a5da15efc SHA-256: 564d59bf2d0d4da95f0f7e9ea6e4c7cd0c42660395be55a95f1057c598683f19
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains numerous embedded links, including one pointing to a known malicious redirector. The presence of a link farm suggests an attempt to game search engines or distribute malicious content through a large number of seemingly innocuous links. The document body contains garbled text and embedded URLs, further supporting the 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.ru/pify?keyword=formas+de+amor+calo+y+ov7
    • http://files.barbierhodesdancestudio.com/uploads/1/3/1/8/131856949/f39a0d4.pdf
    • http://files.beautyunderoneroof.com/uploads/1/3/2/6/132681969/2883554.pdf
    • http://files.kwslagle.com/uploads/1/3/1/6/131607063/352130.pdf
    • http://files.thegreatmonarchofthenorththatiscanada.com/uploads/1/3/0/8/130813054/sinemevusebakofepava.pdf
    • https://cdn.shopify.com/s/files/1/0437/1539/5738/files/ryobi_weed_eater_gas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/tobunavazewevasode.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/4704146550.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/16343236153.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/kanujomevojowirapozavon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/24554463059.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/beating_the_streets_by_peter_lynch.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/bel_canto_vocal_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/7464/0286/files/jojidobazobizu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9605/files/git_remote_prune.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/97711154608.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_off00004987.bin
b46504bf33cce8b77bebe7d188656b10c9f4b2bb34308305f20d360bd0faa032
pdf-font-stream PDF embedded font (sfnt) at offset 0x4987 5284 bytes
font_01_sfnt_off00005b79.bin
0ee6cbdf59e4e592709f6ca6e0f7ed66c7e11a90fb8dbd227214ac2e97f086e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B79 11616 bytes