Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b1945dd74ed9c1…

MALICIOUS

PDF

43.9 KB Created: 2020-09-19 07:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8b90b9b1c5eb31b305095495f97e59 SHA-1: ee5d3cfe528197a1876777f3705792543a3ce2d1 SHA-256: 06b1945dd74ed9c16be035978b5e49bf9b8e0b18305a0a95a371818a64f8b5ab
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body text, though garbled, includes a URL that appears to be a lure for free music downloads. This suggests the PDF is designed to trick users into visiting malicious sites, likely to download further malware or engage in phishing. No scripts were extracted, but the presence of embedded links and the ML classifier's high confidence indicate 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.me/wix?keyword=enrique+iglesias+mp3+free+download+320kbps
    • http://files.saltysidewalks.com/uploads/1/3/2/6/132682813/b4010e08f02463.pdf
    • http://files.soapbarlounge.com/uploads/1/3/0/7/130776718/luriza_bokitewakikizu_sepipe.pdf
    • http://files.flynnscareerandcollegeready.com/uploads/1/3/1/4/131411762/5d608b96b1f086.pdf
    • http://lenopori.mtreturnables.com/uploads/1/3/1/0/131070043/venupojapu-funulek-zeduduk-vamuvozazurul.pdf
    • http://mibajope.geauxnelasports.com/uploads/1/3/2/7/132740624/debfa4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5606/1850/files/litukofikosagukuzejix.pdf
    • https://cdn.shopify.com/s/files/1/0431/2252/4326/files/gifuwetefudifabo.pdf
    • https://cdn.shopify.com/s/files/1/0483/9391/2480/files/hammurabi_laws_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0461/9154/2423/files/cissp_endorsement_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/56517710468.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/automatic_door_control_system.pdf
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/contemporary_abstract_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/valosukasifomed.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/mimicry_is_the_sincerest_form_of_flattery.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f4.bin
bb17ecc3b9b2aa22df79a6e9fc97a6f59d85e390168dbb66fa5869645785ef2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F4 6180 bytes
font_01_sfnt_off00006df4.bin
ad523019bed75301ec9ce5a7148435773d865c8b8c0d535658e5a5c66ecffe08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF4 17052 bytes

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