Malicious PDF — malware analysis report

Static analysis result for SHA-256 3486132cf8f4072a…

MALICIOUS

PDF

55.5 KB Created: 2020-09-02 07:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31eb143b0fbcbeecf34b0f2065aa5c4f SHA-1: b22d5dc15e9dc2e01dcd9c2f658eb1ce77226258 SHA-256: 3486132cf8f4072a207637df64a83ffea5cb76b4eab9eda8c9d021f9bce196fc
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Hahns macaw care sheet' and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=hahns+macaw+care+sheet
    • https://static.usrfiles.com/ugd/3e9e83_b5c617811737446c9af091bee604fe17.pdf
    • https://static.usrfiles.com/ugd/25c42e_b100a77f3cf045afbd233d0f39e87cfb.pdf
    • https://static.usrfiles.com/ugd/06497e_f80d3feba1c24aed9add577109a9bc0e.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6e38f82106874cdf84dba6d3d606768d.pdf
    • https://static.usrfiles.com/ugd/45fd81_3fdeefb9c845486d8057403a1f486d5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cf2434e77a640cd87f7e51f4caa81fd.pdf
    • https://static.usrfiles.com/ugd/136d07_c315c4802bcb4724992fbcdee5164e80.pdf
    • https://static.usrfiles.com/ugd/b8c837_175f96dd976f40d58580415c47c74b16.pdf
    • https://static.usrfiles.com/ugd/d01287_879c1ddbc68d4fba8891527181c6622a.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9912/files/58551608061.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/sonatuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/bgf_pszk_szakdolgozat_formai_kvetelmnyek.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/toefl_ibt_test_format.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/94979852534.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bc1.bin
c158b79f6c00b630c85ffb5622935ed0a7ee46f5e0d99082456bc7f1b6c9fc4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC1 5060 bytes
font_01_sfnt_off0000acda.bin
66285074b1769be082cdae56daf827dc2c8d18a5e40b1be334132817aea69bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xACDA 10736 bytes