Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1d3293a618e699…

MALICIOUS

PDF

46.7 KB Created: 2020-07-16 04:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3342815680f16268afb8449607225cc SHA-1: 6aa57d207db661671c459f2e8eb3325d93df06be SHA-256: 3e1d3293a618e699ee2dda9e9afb7944a714d1aa10119777e9629acd4ed47077
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one link points to known malicious redirector infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large number of external PDF links, likely intended to manipulate search engine results or distribute malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the embedded links.

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/wb?keyword=hybrid%20solar%20desiccant%20cooling%20system%20seminar%20report%20pdf
    • http://files.parksideict.com/uploads/1/3/2/7/132711999/fexanujezagulej.pdf
    • http://files.maconcountyveterans.org/uploads/1/3/2/7/132710565/tepava-kizawo-ziruri-gupivasiviv.pdf
    • http://files.basketbashersdiscgolf.com/uploads/1/3/1/4/131438157/dojevar.pdf
    • http://files.stonefoxfeather.com/uploads/1/3/1/4/131437846/7032695.pdf
    • http://files.yanivtaubenhouse.com/uploads/1/3/2/8/132815785/b0b9943e3.pdf
    • http://files.highpeaksedteam.org/uploads/1/3/0/8/130813851/a54af28.pdf
    • http://files.thecherigroves.com/uploads/1/3/1/3/131398156/0c09cff1c7.pdf
    • http://files.pinupprincess.co.uk/uploads/1/3/0/8/130813988/a76d7e6560ba.pdf
    • http://files.thecherigroves.com/uploads/1/3/1/3/131398156/0c09c
    • https://mobovowafe.files.wordpress.com/2020/06/wonazezilixebufogakamij.pdf
    • https://zozijonatoto.files.wordpress.com/2020/06/74058315629.pdf
    • https://repaxazaw.files.wordpress.com/2020/06/87205656458.pdf
    • https://nirakopifaz.files.wordpress.com/2020/06/tejagetiziwakar.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/konavuvofimoxorurileri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3541/0077/files/7056753398.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/jodumopumovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/wupujesefokeduniboxomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.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_off0000779c.bin
aa770a46dd520e620b337166b4f2a5cac03cc9be6fa3fc200a76d2910883a8fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 5468 bytes
font_01_sfnt_off00008a1c.bin
96e93a1ea6b66a45ce867917cec5a8e59aa96771541f18c42d1a4ee5017157f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1C 10256 bytes

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