Malicious PDF — malware analysis report

Static analysis result for SHA-256 0441eb010c91191c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-16 13:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88ad78517c98751348f93ef52d9158bd SHA-1: f9c0eeb4536d3d67dc182b1c977fadfc5abfb988 SHA-256: 0441eb010c91191c5576c32c12708bcfa8319da8b436fd3edd06177f74d3cc3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs and a document body that appears to be a lure for sheet music, which is a common tactic for phishing or malware distribution. The critical heuristic firing for a malicious redirector link, along with numerous other PDF links, strongly suggests malicious intent. The ML classifier also flagged this PDF with high confidence.

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=post+malone+feeling+whitney+piano+sheet+music
    • http://xedebutid.sepcal.online/uploads/1/3/1/3/131379732/vukijaxage.pdf
    • http://files.leadyouhomeoriginals.com/uploads/1/3/1/3/131398574/3da0840a.pdf
    • http://files.dylanness.com/uploads/1/3/0/9/130969819/860cb.pdf
    • http://maxegeda.krmenterprise.com/uploads/1/3/0/7/130740178/6138270.pdf
    • https://www.amchords.com/chords/1272018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/wiruderilefabarog.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/pararezupabagimusemuxoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/mirob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/dowifimemofuvusugedem.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/zuvir.pdf
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/jarirurilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/niwulirubezoxixafubixuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/76411264677.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/47292265609.pdf
    • https://cdn.shopify.com/s/files/1/0440/6044/2774/files/zaxijigirerupepefiku.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/muslim_boy_names_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/fumokudinixoxiwemewetavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/soxawaxowufujov.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e62.bin
1d0e602fe62f10f0990d5dbc92a1db507642fa6c33be4d158a93a9357c7f3d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E62 5412 bytes
font_01_sfnt_off000060ba.bin
37b2dcc936299066dab33bbe85e3c8a342caa7f33cecd1876d0ce8e0afc54d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 13656 bytes
font_02_sfnt_off00008c7a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7A 4324 bytes

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