Malicious PDF — malware analysis report

Static analysis result for SHA-256 2809e62be1a485ab…

MALICIOUS

PDF

45.0 KB Created: 2020-08-15 00:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39dc8f3c0322e7671ae0f18aeb79fd81 SHA-1: fcb5775a5dbd9037bc10c694878ca2a35ca87955 SHA-256: 2809e62be1a485ab7ed64ac01cdce3382fe77c7c6e60cf1d7ee4e7def03672ef
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, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=cbre+sydney+office+report'. The document body, though heavily obfuscated, appears to contain references to this URL and other PDF files hosted on various domains. This suggests a phishing or malware distribution attempt where the user is enticed to click the malicious link, leading to further compromise.

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=cbre+sydney+office+report
    • http://rivopafeb.mycarisdead.com/uploads/1/3/2/8/132814930/zapalugon_kuparomudajobe.pdf
    • http://files.klmlaw.com/uploads/1/3/2/6/132695194/7332e.pdf
    • http://kibevid.jeecontentandcopy.com/uploads/1/3/1/4/131452977/2105451.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/17426384096.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/wewoxivirojuxuki.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/28704343970.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/mens_haircut_headsheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4718/8640/files/tafapel.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/naluvudivofusamewofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/wopefipagiwibitidon.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/risumodofel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/22886142858.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_off000071ef.bin
1691bed8de1bddc15b18ae6733101625023ad2edd1f6f8df053dde749cc5671e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 5052 bytes
font_01_sfnt_off0000832c.bin
338a2cec2e8e2dc1a22b80177911d1785e215d4a555bfa94042afbf151848635
pdf-font-stream PDF embedded font (sfnt) at offset 0x832C 10664 bytes