Malicious PDF — malware analysis report

Static analysis result for SHA-256 336aaf8ad00f69d1…

MALICIOUS

PDF

40.7 KB Created: 2020-08-03 11:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1c011ab4be60e0d5452538b1a0baec6 SHA-1: acc7b93d10333dfa7e6f25f2016d1d57c82063cb SHA-256: 336aaf8ad00f69d17cd35c6d475827450b196cea1aed9e2cde6c912c3e8c4af6
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body disguised as a search query. This link leads to a URL known for malicious redirection. The document also exhibits characteristics of a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=braveheart+piano+notes+pdf
    • http://files.dylanbeddow.com/uploads/1/3/0/9/130969470/2827036.pdf
    • http://files.assemblyofgeeks.com/uploads/1/3/1/6/131636651/6241108.pdf
    • http://files.rmelectricsolutions.com/uploads/1/3/1/1/131164076/251430.pdf
    • http://files.mylifeinchange.com/uploads/1/3/1/4/131482819/2880625.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/bajojinajovuziro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/xazefaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/5855376925.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/49728839485.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/dogakokujemotuduboseru.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/bleep_sound_effect_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/fopijap.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/contact_form_7_additional_headers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/jerixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/honeywell_6150_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/bubizumunokorusowajeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/xinixed.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/34543466441.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_off00005f5e.bin
b45f5ee9eeb97b068019dd8c31cfc79eabd5dc5734bd59f4ecebc4dcfe1dedfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5E 5208 bytes
font_01_sfnt_off00007117.bin
ad92d7332127c6b55b01b9d25a7870022685b17327c040e2d9a225193c2c1c7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 10308 bytes